67486 + Interview Questions in Secondary School in Physics

1.	A 2kg is stone dropped from a height of 100m from the ground. Find its potential and kinetic energy when the stone id 60m from the ground.
Answer» PLEASE MARK me BRAINLIEST if I am RIGHT

1.

A 2kg is stone dropped from a height of 100m from the ground. Find its potential and kinetic energy when the stone id 60m from the ground.

Answer»

PLEASE MARK me BRAINLIEST if I am RIGHT

Discussion

2.	Name the factors on which volumetric expansion of solid depends
Answer» Answer: Thermal expansion of solids DEPENDS, on the following factors : (i) NATURE of the material, (ii) INITIAL dimension of the SOLID, (iii) rise in temperature of the solid. Explanation: hope it helps UH

2.

Name the factors on which volumetric expansion of solid depends

Answer»

Answer:

Thermal expansion of solids DEPENDS, on the following factors : (i) NATURE of the material, (ii) INITIAL dimension of the SOLID, (iii) rise in temperature of the solid.

Explanation:

hope it helps UH

Discussion

3.	heat porduced in a wire of resistant r due to the current flowing at a current flowing at a constant potential difference is porportional to
Answer» Hence to state a relationship between resistance and HEAT generated, you need to CRACK down the VOLTAGE into independent QUANTITIES- resistance and current. Then the equation READS H=I2Rt, which tells us that heat is directly proportional to resistance

Discussion

4.	The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed? 1 OR Name the part of a lens through which a ray of light passes without suffering any deviation.
Answer» Answer: 1) Between POLE and FOCUS

4.

The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed? 1 OR Name the part of a lens through which a ray of light passes without suffering any deviation.

Answer»

Answer:

1) Between POLE and FOCUS

Discussion

5.	4.Spring balance measures theof a body.Tad
Answer» ANSWER: spring BALANCE is USED to measure the weight of an object

5.

4.Spring balance measures theof a body.Tad

Answer»

ANSWER:

spring BALANCE is USED to measure the weight of an object

Discussion

6.	Q-17 The space surrounding a material body in which gravitational force of attraction can be experiencedis called its gravitational field. Gravitational Field intensity: The intensity of the gravitational field of amaterial body at any point in its field is defined as the force experienced by a unit mass (test mass) placedat that point. If a test mass mat a point in a gravitational field experiences a force F then I Fm
Answer» GRAVITATIONAL FORCE is the force between two bodies irrespective of the presence of any objects between them, Fg=R2GMm where G is the constant of GRAVITATION, M and m are the masses of Earth and the object, R is the distance between the object and CENTER of Earth.

6.

Q-17 The space surrounding a material body in which gravitational force of attraction can be experiencedis called its gravitational field. Gravitational Field intensity: The intensity of the gravitational field of amaterial body at any point in its field is defined as the force experienced by a unit mass (test mass) placedat that point. If a test mass mat a point in a gravitational field experiences a force F then I Fm

Answer»

GRAVITATIONAL FORCE is the force between two bodies irrespective of the presence of any objects between them,

Fg=R2GMm where G is the constant of GRAVITATION, M and m are the masses of Earth and the object, R is the distance between the object and CENTER of Earth.

Discussion

7.	Difference between cathode ,anode and cation and anion?
Answer» ANSWER: An anion may be DEFINED as an atom or MOLECULE that is negatively changed. A cation may be defined as an atom or molecule that is POSITIVELY charged. Explanation:

7.

Difference between cathode ,anode and cation and anion?

Answer»

ANSWER:

An anion may be DEFINED as an atom or MOLECULE that is negatively changed.

A cation may be defined as an atom or molecule that is POSITIVELY charged.

Explanation:

Discussion

8.	There are five objects of masses 1kg 2kg 3kg and 4kg and 5kg in a circular path and you are at the centre of the circular paths which of the objects will maximum force of gravitation from you and why
Answer» *OK so 56d456g5ds5f945dgr+-fe4hdr56s+h/fj4= ANSWER, HOPE this HELPS XD**

8.

There are five objects of masses 1kg 2kg 3kg and 4kg and 5kg in a circular path and you are at the centre of the circular paths which of the objects will maximum force of gravitation from you and why

Answer»

OK so 56d456g5*ds5f945dgr+-fe4hdr56s+h/fj4= ANSWER,

HOPE this HELPS XD

Discussion

9.	QMark for revievRadical axis exists for
Answer» Answer: Explanation: Hope it's really HELPS PLEASE mark me as BRAINLIEST please!

9.

QMark for revievRadical axis exists for

Answer»

Answer:

Explanation:

Hope it's really HELPS

PLEASE mark me as BRAINLIEST please!

Discussion

10.	In the minimum deviation position of a diffraction gratingthe first order spectrum corresponds to an angular devia-tion of 30°. If 2 = 6 x 10 cm, calculate the gratingelement.
Answer» Explanation: It is the collective responsibility of the government and the people of India to KEEP the beautiful diversity of our nation bound in the cord of unity INTACT. Let's preserve the diversity of our UNIQUE country by upholding unity among its different cultures, languages, faiths, customs, and traditions.

10.

In the minimum deviation position of a diffraction gratingthe first order spectrum corresponds to an angular devia-tion of 30°. If 2 = 6 x 10 cm, calculate the gratingelement.

Answer»

Explanation:

It is the collective responsibility of the government and the people of India to KEEP the beautiful diversity of our nation bound in the cord of unity INTACT. Let's preserve the diversity of our UNIQUE country by upholding unity among its different cultures, languages, faiths, customs, and traditions.

Discussion

11.	an object 4cm in size, is placed at 25cm in front of a concavr mirror of focal length 15cm.at wt distance from the mirror would a screen be placed in order to obtain a sharp image? find the nature and the size of the image
Answer» Given : In concave mirror, Object height = - 4cm. Object DISTANCE = 25cm. Focal length = - 15cm. Remember ! In concave mirror focal length is negative. To find : (a) Image distance (b) Size of image (c) Nature of image Solution : (a) using mirror formula .i.e., The relationship between image distance, object distance and focal length of a spherical mirror is known as Mirror formula. The mirror formula can be written as : $\boxed{ \bf \dfrac{1}{v} + \dfrac{1}{u} = \dfrac{1}{f} }$ where, v denotes image distance. u denotes object distance. f denotes focal length. substituting all the given values in the formula, $\leadsto{ \sf \dfrac{1}{v} + \dfrac{1}{u} = \dfrac{1}{f} }$ $\leadsto{ \sf \dfrac{1}{v} + \dfrac{1}{( - 25)} = \dfrac{1}{ - 15} }$ $\leadsto{ \sf \dfrac{1}{v} - \dfrac{1}{25} = - \dfrac{1}{15} }$ $\leadsto{ \sf \dfrac{1}{v} = - \dfrac{1}{15} + \dfrac{1}{25} }$ $\leadsto{ \sf \dfrac{1}{v} = - \dfrac{ 7 + 3}{75} }$ $\leadsto{ \sf \dfrac{1}{v} = - \dfrac{10}{75} }$ $\leadsto{ \sf v= - \dfrac{7.5}{10} }$ $\leadsto \underline{\boxed{ \sf v = - 7.5 \: cm}}$ thus, the Image distance is -7.5cm (b) MAGNIFICATION : The magnificent PRODUCED by a mirror is equal to the ratio of the image distance to the object distance with a minus SIGN, $\leadsto{ \bf m= - \dfrac{v}{u} }$ $\leadsto{ \sf m= - \dfrac{( - 7.5)}{25} }$ $\leadsto{ \sf m= 0.3 }$ we know that, $\leadsto{ \bf m= \dfrac{h'}{h} }$ $\leadsto{ \sf 0.3= \dfrac{h'}{4} }$ $\leadsto{ \sf h' = 0.3 \times 4 }$ $\leadsto \underline{\boxed{ \sf h' = 1.2 \: cm }}$ thus, Image height h' is 1.2cm. (c) Nature of image : The image is real and inverted. The image is diminished.

11.

an object 4cm in size, is placed at 25cm in front of a concavr mirror of focal length 15cm.at wt distance from the mirror would a screen be placed in order to obtain a sharp image? find the nature and the size of the image

Answer»

Given :

In concave mirror,

Object height = - 4cm.

Object DISTANCE = 25cm.

Focal length = - 15cm.

Remember !

In concave mirror focal length is negative.

To find :

(a) Image distance

(b) Size of image

(c) Nature of image

Solution :

(a) using mirror formula .i.e.,

The relationship between image distance, object distance and focal length of a spherical mirror is known as Mirror formula.

The mirror formula can be written as :

$\boxed{ \bf \dfrac{1}{v} + \dfrac{1}{u} = \dfrac{1}{f} }$

where,

v denotes image distance.
u denotes object distance.
f denotes focal length.

substituting all the given values in the formula,

$\leadsto{ \sf \dfrac{1}{v} + \dfrac{1}{u} = \dfrac{1}{f} }$

$\leadsto{ \sf \dfrac{1}{v} + \dfrac{1}{( - 25)} = \dfrac{1}{ - 15} }$

$\leadsto{ \sf \dfrac{1}{v} - \dfrac{1}{25} = - \dfrac{1}{15} }$

$\leadsto{ \sf \dfrac{1}{v} = - \dfrac{1}{15} + \dfrac{1}{25} }$

$\leadsto{ \sf \dfrac{1}{v} = - \dfrac{ 7 + 3}{75} }$

$\leadsto{ \sf \dfrac{1}{v} = - \dfrac{10}{75} }$

$\leadsto{ \sf v= - \dfrac{7.5}{10} }$

$\leadsto \underline{\boxed{ \sf v = - 7.5 \: cm}}$

thus, the Image distance is -7.5cm

(b) MAGNIFICATION :

The magnificent PRODUCED by a mirror is equal to the ratio of the image distance to the object distance with a minus SIGN,

$\leadsto{ \bf m= - \dfrac{v}{u} }$

$\leadsto{ \sf m= - \dfrac{( - 7.5)}{25} }$

$\leadsto{ \sf m= 0.3 }$

we know that,

$\leadsto{ \bf m= \dfrac{h'}{h} }$

$\leadsto{ \sf 0.3= \dfrac{h'}{4} }$

$\leadsto{ \sf h' = 0.3 \times 4 }$

$\leadsto \underline{\boxed{ \sf h' = 1.2 \: cm }}$

thus, Image height h' is 1.2cm.

(c) Nature of image :

The image is real and inverted.
The image is diminished.

Discussion

12.	The resistance of a galvanometer coil is 1000,The value of current for full scale deflectionin it is 1mA. What should be the value ofseries resistance to be used to convert it5.into a voltmeter of 12volt range(A) 11.9K12(B) 1262(C) 12.1K2(D) none of the aboveal
Answer» ANSWER: okkkkkkkkkkkkkkkkkk

12.

The resistance of a galvanometer coil is 1000,The value of current for full scale deflectionin it is 1mA. What should be the value ofseries resistance to be used to convert it5.into a voltmeter of 12volt range(A) 11.9K12(B) 1262(C) 12.1K2(D) none of the aboveal

Answer»

ANSWER:

okkkkkkkkkkkkkkkkkk

Discussion

13.	What is unohmic circuit write with example
Answer» ANSWER: Non-Ohmic Devices Non-Ohmic DevicesSuch devices do not have a constant value of resistance and the resistance is called dynamic resistance because it is constantly CHANGING. Examples of such devices are TUNGSTEN filament (bulb), diode, thermistor etc. Explanation: hope it helps uh

13.

What is unohmic circuit write with example

Answer»

ANSWER:

Non-Ohmic Devices

Non-Ohmic DevicesSuch devices do not have a constant value of resistance and the resistance is called dynamic resistance because it is constantly CHANGING. Examples of such devices are TUNGSTEN filament (bulb), diode, thermistor etc.

Explanation:

hope it helps uh

Discussion

14.	What is an example of unlike parallel forces
Answer» Explanation: An EXAMPLE of this is a see saw. ANOTHER example are the major vertical forces on an airplane in FLIGHT hope it HELPS

14.

What is an example of unlike parallel forces

Answer»

Explanation:

An EXAMPLE of this is a see saw. ANOTHER example are the major vertical forces on an airplane in FLIGHT

hope it HELPS

Discussion

15.	3.Physical quantities are of two typesand vector
Answer» Answer: Explanation: PHYSICAL quantities are classified into two types. ... These are LENGTH, mass, time, electric CURRENT, temperature, luminous intensity and amount of substance. Quantities that can be EXPRESSED in terms of fundamental quantities are called derived quantities. For example, area, VOLUME, velocity, acceleration, force.

15.

3.Physical quantities are of two typesand vector

Answer»

Answer:

Explanation:

PHYSICAL quantities are classified into two types. ... These are LENGTH, mass, time, electric CURRENT, temperature, luminous intensity and amount of substance. Quantities that can be EXPRESSED in terms of fundamental quantities are called derived quantities. For example, area, VOLUME, velocity, acceleration, force.

Discussion

16.	Dimensional formula of velocity
Answer» ANSWER: eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee Explanation:

16.

Dimensional formula of velocity

Answer»

ANSWER:

eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Explanation:

Discussion

17.	Mention two application of ultrasound.
Answer» ULTRASOUND are used by bats to locate obstacles in their path, to DRILL holes in MATERIALS like glass, cleaning minute objects, detection of defects in metals, imaging human ORGANS by ultrasonography and echo cardiography, remove cataract and in SONAR(Sound navigation and ranging) to detect and find distance of objects ...

17.

Mention two application of ultrasound.

Answer»

ULTRASOUND are used by bats to locate obstacles in their path, to DRILL holes in MATERIALS like glass, cleaning minute objects, detection of defects in metals, imaging human ORGANS by ultrasonography and echo cardiography, remove cataract and in SONAR(Sound navigation and ranging) to detect and find distance of objects ...

Discussion

18.	What is the relationship between the three coffients of the thermal expansion
Answer» Answer: RELATIONSHIP to Linear THERMAL Expansion Coefficient For isotropic material, and for small expansions, the linear thermal expansion coefficient is ONE third the volumetric coefficient.

18.

What is the relationship between the three coffients of the thermal expansion

Answer»

Answer:

RELATIONSHIP to Linear THERMAL Expansion Coefficient

For isotropic material, and for small expansions, the linear thermal expansion coefficient is ONE third the volumetric coefficient.

Discussion

19.	Kinetic energy never be negative. Justify this statement.
Answer» Explanation: Since kinetic ENERGY is based on MOTION, it is always a positive VALUE. If it is not in motion, the kinetic energy of that object is ZERO. Kinetic energy can never be a negative value. Kinetic energy can be quantified as one half of the mass times the velocity SQUARED.

19.

Kinetic energy never be negative. Justify this statement.

Answer»

Explanation:

Since kinetic ENERGY is based on MOTION, it is always a positive VALUE. If it is not in motion, the kinetic energy of that object is ZERO. Kinetic energy can never be a negative value. Kinetic energy can be quantified as one half of the mass times the velocity SQUARED.

Discussion

20.	A spanner having long arm help him to do with greater ease than the one having short arm why
Answer» ANSWER: A SPANNER with longer arm provide more torque compared to a spanner with SHORTER arm because the DISTANCE between two FORCES is more to the longer arm spanner so we prefered it .

20.

A spanner having long arm help him to do with greater ease than the one having short arm why

Answer»

ANSWER:

A SPANNER with longer arm provide more torque compared to a spanner with SHORTER arm because the DISTANCE between two FORCES is more to the longer arm spanner so we prefered it .

Discussion

21.	A magnet attracting iron flingings so is it a contact force or non contact force?? Plz ans fast...I need it right NOW
Answer» ANSWER: CONTACT FORCE........ PLZ MAKE my answer as brainest

21.

A magnet attracting iron flingings so is it a contact force or non contact force?? Plz ans fast...I need it right NOW

Answer»

ANSWER:

CONTACT FORCE........

PLZ MAKE my answer as brainest

Discussion

22.	Below given organisms is responsible for
Answer» your QUESTION is INCOMPLETE.....

22.

Below given organisms is responsible for

Answer»

your QUESTION is INCOMPLETE.....

Discussion

23.	Explain the change in speed and direction of light when light travels from one medium to another medium (with suitable diagrams)
Answer» Answer: Reflection is the PHENOMENON in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. Refraction of light is the phenomenon of bending of light or change in the direction of light, when it PASSES OBLIQUELY from one transparent medium to another. Diffraction is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam. Scattering is the phenomenon by which a beam of light is redirected or deflected in MANY different directions when it passes through an imperfect medium due to the INTERACTION with the particles of the medium.

23.

Explain the change in speed and direction of light when light travels from one medium to another medium (with suitable diagrams)

Answer»

Answer:

Reflection is the PHENOMENON in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.

Refraction of light is the phenomenon of bending of light or change in the direction of light, when it PASSES OBLIQUELY from one transparent medium to another.

Diffraction is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam.

Scattering is the phenomenon by which a beam of light is redirected or deflected in MANY different directions when it passes through an imperfect medium due to the INTERACTION with the particles of the medium.

Discussion

24.	The current in the wire varies with time according to the relation i= 4+ 2t^2 How many coulomb of charge pass a cross section of wire in time interval t= 5 s to t=10 s?
Answer» GIVEN : The current in the WIRE varies with time according to the ration $\tt{I=4+2t^2}$ . To Find : Amount of CHARGE passing through area of cross SECTION in time interval t = 5s to t = 10s. Solution : ❒ Electric current is DEFINED as the rate of charge flow per unit time in the conductor. Mathematically, I = q / t If t → 0 then I = dq / dt It is a scalar quantity having only magnitude. SI unit : A $\sf:\implies\:I=\dfrac{dq}{dt}$ $\sf:\implies\:dq=I\:dt$ Integrating both sides, we get $\displaystyle\sf:\implies\:\int dq=\int I\:dt$ $\displaystyle\sf:\implies\:\int dq=\int(4+2t^2)\:dt$ $\displaystyle\sf:\implies\:q=\bigg[4t+\dfrac{2t^3}{3}\bigg]_5^{10}$ $\sf:\implies\:q=4(10-5)+\dfrac{2(10^3-5^3)}{3}$ $\sf:\implies\:q=4(5)+\dfrac{2(1000-125)}{3}$ $\sf:\implies\:q=20+\dfrac{2(875)}{3}$ $\sf:\implies\:q=20+\dfrac{1750}{3}$ $\sf:\implies\:q=20+583.33$ $:\implies\:\underline{\boxed{\bf{\gray{q=603.33\:C}}}}$

24.

The current in the wire varies with time according to the relation i= 4+ 2t^2 How many coulomb of charge pass a cross section of wire in time interval t= 5 s to t=10 s?

Answer»

GIVEN :

The current in the WIRE varies with time according to the ration $\tt{I=4+2t^2}$ .

To Find :

Amount of CHARGE passing through area of cross SECTION in time interval t = 5s to t = 10s.

Solution :

❒ Electric current is DEFINED as the rate of charge flow per unit time in the conductor.

Mathematically, I = q / t

If t → 0 then I = dq / dt

It is a scalar quantity having only magnitude.
SI unit : A

$\sf:\implies\:I=\dfrac{dq}{dt}$

$\sf:\implies\:dq=I\:dt$

Integrating both sides, we get

$\displaystyle\sf:\implies\:\int dq=\int I\:dt$

$\displaystyle\sf:\implies\:\int dq=\int(4+2t^2)\:dt$

$\displaystyle\sf:\implies\:q=\bigg[4t+\dfrac{2t^3}{3}\bigg]_5^{10}$

$\sf:\implies\:q=4(10-5)+\dfrac{2(10^3-5^3)}{3}$

$\sf:\implies\:q=4(5)+\dfrac{2(1000-125)}{3}$

$\sf:\implies\:q=20+\dfrac{2(875)}{3}$

$\sf:\implies\:q=20+\dfrac{1750}{3}$

$\sf:\implies\:q=20+583.33$

$:\implies\:\underline{\boxed{\bf{\gray{q=603.33\:C}}}}$

Discussion

25.	42. HA + OH- + H2O + A- + 91 kJH+ + OH- > H2O + 92 kJThe enthalpy of ionisation of HA is(1) (q, +92)(2) (91-92)(3) (92-94)(4) -(91 +92)
Answer» EXPLANATION: HOPE it will HELP you BRO

25.

42. HA + OH- + H2O + A- + 91 kJH+ + OH- > H2O + 92 kJThe enthalpy of ionisation of HA is(1) (q, +92)(2) (91-92)(3) (92-94)(4) -(91 +92)

Answer»

EXPLANATION:

HOPE it will HELP you BRO

Discussion

26.	What is covalent bond
Answer» Answer: A covalent bond is a chemical bond that involves the sharing of electron PAIRS between ATOMS. These electron pairs are known as shared pairs or BONDING pairs, and the stable BALANCE of attractive and repulsive FORCES between atoms, when they share electrons, is known as covalent bonding.

26.

What is covalent bond

Answer»

Answer:

A covalent bond is a chemical bond that involves the sharing of electron PAIRS between ATOMS. These electron pairs are known as shared pairs or BONDING pairs, and the stable BALANCE of attractive and repulsive FORCES between atoms, when they share electrons, is known as covalent bonding.

Discussion

27.	Write the correct realtionship between speed ,time and distance with long answer
Answer» Answer: Relationship Between Speed, Time & Distance Speed = Distance/Time – This tells US how SLOW or fast an object moves. It describes distance travelled divided by the time taken to cover the distance. Time = Distance / Speed, as the speed INCREASES the time taken will DECREASE and vice versa. Explanation: Follow me mark as brainliest

27.

Write the correct realtionship between speed ,time and distance with long answer

Answer»

Answer:

Relationship Between Speed, Time & Distance

Speed = Distance/Time – This tells US how SLOW or fast an object moves. It describes distance travelled divided by the time taken to cover the distance. Time = Distance / Speed, as the speed INCREASES the time taken will DECREASE and vice versa.

Explanation:

Follow me

mark as brainliest

Discussion

28.	[2]it actsComplete the path of the monochromatic lightPQ of the equilateral glass prism PQR till it emerincident on the surfaceut of the prism due tohusrefractiondoes n10 WOIРВCU$ caugrecticcest1onА A·f weRng t12Where should an object be placed in front of a convex lens in order to get:Oneanged real image
Answer» ANSWER: I do not know this you used to stay in the WORLD for a while ago and I have to take loan me some time to get a CHANCE to win the lottery ticket for the bell to RING you later on TODAY and I have to take loan me some time to get a chance to win the lottery

28.

[2]it actsComplete the path of the monochromatic lightPQ of the equilateral glass prism PQR till it emerincident on the surfaceut of the prism due tohusrefractiondoes n10 WOIРВCU$ caugrecticcest1onА A·f weRng t12Where should an object be placed in front of a convex lens in order to get:Oneanged real image

Answer»

ANSWER:

I do not know this you used to stay in the WORLD for a while ago and I have to take loan me some time to get a CHANCE to win the lottery ticket for the bell to RING you later on TODAY and I have to take loan me some time to get a chance to win the lottery

Discussion

29.	Calculate the spin of only magnetic moment of Cu(NH3) 4) 2- ion
Answer» Answer: 1. Inside buildings. You might have noticed that large OFFICE buildings, stores, hospitals, and other MANY other buildings have convex mirrors in the corners. 2. Sunglasses. We might have used sunglasses many TIMES. 3. Vehicle mirrors. 4. Magnifying glasses. 5. For security purposes. 6. STREET light reflectors. Hope it can HELP you...

29.

Calculate the spin of only magnetic moment of Cu(NH3) 4) 2- ion

Answer»

Answer:

1. Inside buildings. You might have noticed that large OFFICE buildings, stores, hospitals, and other MANY other buildings have convex mirrors in the corners.

2. Sunglasses. We might have used sunglasses many TIMES.

3. Vehicle mirrors.

4. Magnifying glasses.

5. For security purposes.

6. STREET light reflectors.

Hope it can HELP you...

Discussion

30.	.If the diameter of the earth becomes twice its present value but its mass remains unchanged,then how would the weight of an object on the surface of the earth be affected?
Answer» Answer: ... Explanation: If diameter is doubled then radius is also doubled, i.e, the distance of the object from the center DOUBLES. We KNOW that weight is inversely proportional to the square of the distance, so weight REDUCES to ONE fourth its ORIGINAL value.

30.

.If the diameter of the earth becomes twice its present value but its mass remains unchanged,then how would the weight of an object on the surface of the earth be affected?

Answer»

Answer:

...

Explanation:

If diameter is doubled then radius is also doubled, i.e, the distance of the object from the center DOUBLES. We KNOW that weight is inversely proportional to the square of the distance, so weight REDUCES to ONE fourth its ORIGINAL value.

Discussion

31.	सारथीHपिर भी गमवासकोउमाशीय पेशागेत नसीकल सेकण्मकमगिरती कीरिगी पारिप-मसेकणमेसेगोगा प्रेरित वियन तस्करपरिषधमेरबरकत्वपीडियानिग्न पियति के लिए प्रेरित विजन धारापिशाची प्रचितीलिए
Answer» ANSWER: thanks for FREE points EXPLANATION: mark this as BRAINLIST answer

31.

सारथीHपिर भी गमवासकोउमाशीय पेशागेत नसीकल सेकण्मकमगिरती कीरिगी पारिप-मसेकणमेसेगोगा प्रेरित वियन तस्करपरिषधमेरबरकत्वपीडियानिग्न पियति के लिए प्रेरित विजन धारापिशाची प्रचितीलिए

Answer»

ANSWER:

thanks for FREE points

EXPLANATION:

mark this as BRAINLIST answer

Discussion

32.	Discuss Single Phase AC Voltage Controller with On-OffControl Principle
Answer» ANSWER: haaaaaaaaaaaaaaaaaaaaa

32.

Discuss Single Phase AC Voltage Controller with On-OffControl Principle

Answer»

ANSWER:

haaaaaaaaaaaaaaaaaaaaa

Discussion

33.	Write the rules of sign convention for spherical lens(with suitable diagram)
Answer» _________________&______________ Sign CONVENTION for SPHERICAL Mirror: Sign is taken as + (positive) behind the spherical mirror. For example if an IMAGE is formed behind the mirror, the distance of image is taken as + (positive) from pole ALONG the principal axis. The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis. ________________&_______________ HOPE it helps you:)

33.

Write the rules of sign convention for spherical lens(with suitable diagram)

Answer»

_________________&______________

Sign CONVENTION for SPHERICAL Mirror:

Sign is taken as + (positive) behind the spherical mirror. For example if an IMAGE is formed behind the mirror, the distance of image is taken as + (positive) from pole ALONG the principal axis.

The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis.

________________&_______________

HOPE it helps you:)

Discussion

34.	the torque applied on a body depends upon moment of inertia I and angular acceleration , deduce a suitable reason
Answer» EXPLANATION: ndndndndhdhdhrbewnbsgdshbssnwnhdbenenshsshsbbsbdbdbdbddbdbdbdbbdbdbfbfbfbffbbfbffbbfbf

34.

the torque applied on a body depends upon moment of inertia I and angular acceleration , deduce a suitable reason

Answer»

EXPLANATION:

ndndndndhdhdhrbewnbsgdshbssnwnhdbenenshsshsbbsbdbdbdbddbdbdbdbbdbdbfbfbfbffbbfbffbbfbf

Discussion

35.	What are the third law of motion ?
Answer» Newton's third law: If an object A EXERTS a FORCE on object B, then object B must exert a force of EQUAL magnitude and OPPOSITE DIRECTION back on object A.

Discussion

36.	A uniform electric field E = 8000 N/C is passing through a flat square area A = 10 m2making an angle of 60 ֠ . Determine the electric flux
Answer» Given INFO : A UNIFORM electric field E = 8000 N/C is passing through a flat square area A = 10 m² MAKING an angle of 60° . To find : The electric FLUX in this uniform field is ... SOLUTION : angle made by electric field with flat surface is 60°. as we know, area vector is normal to the surface of it. so, angle between electric field and area vector is (90° - 60°) = 30° now electric flux = EAcosΦ = 8000 N/C × 10 m² × cos30° = 80000 × √3/2 = 40000√3 Nm²/C = 69282 Nm²/C Therefore the electric flux is 69282 Nm²/C.

36.

A uniform electric field E = 8000 N/C is passing through a flat square area A = 10 m2making an angle of 60 ֠ . Determine the electric flux

Answer»

Given INFO : A UNIFORM electric field E = 8000 N/C is passing through a flat square area A = 10 m²

MAKING an angle of 60° .

To find : The electric FLUX in this uniform field is ...

SOLUTION : angle made by electric field with flat surface is 60°. as we know, area vector is normal to the surface of it. so, angle between electric field and area vector is (90° - 60°) = 30°

now electric flux = EAcosΦ

= 8000 N/C × 10 m² × cos30°

= 80000 × √3/2

= 40000√3 Nm²/C

= 69282 Nm²/C

Therefore the electric flux is 69282 Nm²/C.

Discussion

37.	The graph givon alongside shows how the speed of a car changes with time.(each part is for one Mark)(1) What is the initial speed of the car?(ii) What is the maximum speed attained by the car?(iii) Which part of the graph shows zero acceleration?(iv) Which part of the graph shows retardation?40Bс30Speed (km/h)2010 AD0 2 4 6Time (In hour)B 10
Answer» ANSWER: where is the GRAPH SIS???

37.

The graph givon alongside shows how the speed of a car changes with time.(each part is for one Mark)(1) What is the initial speed of the car?(ii) What is the maximum speed attained by the car?(iii) Which part of the graph shows zero acceleration?(iv) Which part of the graph shows retardation?40Bс30Speed (km/h)2010 AD0 2 4 6Time (In hour)B 10

Answer»

ANSWER:

where is the GRAPH SIS???

Discussion

38.	what should be the angle between the direction of force and the direction of motion of a body so that work done is zero?
Answer» Answer: Angle should be 90° between the DIRECTION of force and the direction of motion of a body as workdone is EQUAL to force . or F=Force ,d= Displacement ,theta =Angle between force and displacement W = F.D.costheta cos90° = 0 so,in case of zero WORK, the angle between the force and displacment is 90°.

38.

what should be the angle between the direction of force and the direction of motion of a body so that work done is zero?

Answer»

Answer:

Angle should be 90° between the DIRECTION of force and the direction of motion of a body as workdone is EQUAL to force .

or

F=Force ,d= Displacement ,theta =Angle

between force and displacement

W = F.D.costheta

cos90° = 0

so,in case of zero WORK, the angle between the force and displacment is 90°.

Discussion

39.	સંપર્કબળ અને ક્ષેત્રબળ વચ્ચેની સમાનતા અને ભિન્નતાઓ લખો.
Answer» ANSWER: ASK your QUESTION ⁉️ in ENGLISH

39.

સંપર્કબળ અને ક્ષેત્રબળ વચ્ચેની સમાનતા અને ભિન્નતાઓ લખો.

Answer»

ANSWER:

ASK your QUESTION ⁉️ in ENGLISH

Discussion

40.	A cyclist bends while taking turn to
Answer» Answer: PREVENT TIPPING over in the other direction.......hope it helps you

40.

A cyclist bends while taking turn to

Answer»

Answer:

PREVENT TIPPING over in the other direction.......hope it helps you

Discussion

41.	Derive the equation for Electric Flux passing through a spherical surface with [2+2]point charge at center r.
Answer» ANSWER: hsusiiduhbdhudduvsudiid7r

41.

Derive the equation for Electric Flux passing through a spherical surface with [2+2]point charge at center r.

Answer»

ANSWER:

hsusiiduhbdhudduvsudiid7r

Discussion

42.	The momentum of an object in of mass 0.5 kg is 3 m/s. what is the velocity of the object
Answer» ANSWER: i am really SORRY for this I don't know the answer but I will try it and SEND you the answer but you ALSO try it okay

42.

The momentum of an object in of mass 0.5 kg is 3 m/s. what is the velocity of the object

Answer»

ANSWER:

i am really SORRY for this I don't know the answer but I will try it and SEND you the answer but you ALSO try it okay

Discussion

43.	who ever solve this i will mark his answer as the brainliest you have to do all question otherwise u will be reported
Answer» Answer: Newton's law of universal gravitation is USUALLY stated as that every PARTICLE ATTRACTS every other particle in the UNIVERSE with a force that is directly proportional to the product of their masses and INVERSELY proportional to the square of the distance between their centers.

43.

who ever solve this i will mark his answer as the brainliest you have to do all question otherwise u will be reported

Answer»

Answer:

Newton's law of universal gravitation is USUALLY stated as that every PARTICLE ATTRACTS every other particle in the UNIVERSE with a force that is directly proportional to the product of their masses and INVERSELY proportional to the square of the distance between their centers.

Discussion

44.	(ii) What do you mean by acceleration due to gravity?
Answer» ANSWER: the acceleration of a BODY in free FALL under the influence of EARTH's GRAVITY expressed as the rate of increase of velocity per unit of time Explanation:

44.

(ii) What do you mean by acceleration due to gravity?

Answer»

ANSWER:

the acceleration of a BODY in free FALL under the influence of EARTH's GRAVITY expressed as the rate of increase of velocity per unit of time

Explanation:

Discussion

45.	a biconvex lens in made from 2 spheres of different radii focus is marked from both spherical surfaces and focal length is measured on both sides .will focal length be equal on both sides ?imagine and write an answer
Answer» ANSWER: jjjjjjjjjjjjjjjjjjj

45.

a biconvex lens in made from 2 spheres of different radii focus is marked from both spherical surfaces and focal length is measured on both sides .will focal length be equal on both sides ?imagine and write an answer

Answer»

ANSWER:

jjjjjjjjjjjjjjjjjjj

Discussion

46.	What are the two scale calibrated in a screw gaugeCh - measurment and experiment
Answer» ANSWER: ???????!!?!!!!???!?!?

46.

What are the two scale calibrated in a screw gaugeCh - measurment and experiment

Answer»

ANSWER:

???????!!?!!!!???!?!?

Discussion

47.	.A vessel contains water up to a height of 5.5 m. Taking the density of water as 1000 kilogram/cubic metre, and acceleration due to gravity as 9.8metre/second square, the pressure exerted at the base of the vessel is.............newton/metre square.5.39or 539 or 53900
Answer» Answer: 53900 Pa. Explanation: Height (h) = 5.5 m Density of WATER (p) = 1000 kg/m³ g = 9.8 m/s² Pressure at the base of the vessel is = hpg = (5.510009.8) Pa = 53900 Pa Hope this HELPS.

47.

.A vessel contains water up to a height of 5.5 m. Taking the density of water as 1000 kilogram/cubic metre, and acceleration due to gravity as 9.8metre/second square, the pressure exerted at the base of the vessel is.............newton/metre square.5.39or 539 or 53900

Answer»

Answer:

53900 Pa.

Explanation:

Height (h) = 5.5 m

Density of WATER (p) = 1000 kg/m³

g = 9.8 m/s²

Pressure at the base of the vessel is = hpg

= (5.5*1000*9.8) Pa

= 53900 Pa

Hope this HELPS.

Discussion

48.	A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h–1 in 10 minutes. Find its acceleration.
Answer» Answer: 0.0185 m/s² Explanation: Initial velocity of train, u = 0 Final velocity of train, v = 40 kmph Final velocity, v = 40 × 5/18 = 11.11 m/s Assuming uniform acceleration of ‘a’ m/second square Time taken by train to get it's final velocity, t = 10 minutes = 600 seconds Using FIRST equation of motion, V = u + at 11.11 = 0 + a×600 a = 11.11/600 = 0.0185 m/s² So, required acceleration , a = 0.0185 m/s² HAPPY SUNGHOON DAY!! Our Penguin UwU

48.

A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h–1 in 10 minutes. Find its acceleration.

Answer»

Answer:

0.0185 m/s²

Explanation:

Initial velocity of train, u = 0

Final velocity of train, v = 40 kmph

Final velocity, v = 40 × 5/18 = 11.11 m/s

Assuming uniform acceleration of ‘a’ m/second square

Time taken by train to get it's final velocity,

t = 10 minutes = 600 seconds

Using FIRST equation of motion,

V = u + at

11.11 = 0 + a×600

a = 11.11/600

= 0.0185 m/s²

So, required acceleration , a = 0.0185 m/s²

HAPPY SUNGHOON DAY!! Our Penguin UwU

Discussion

49.	Interpretation from the Graph:A) Refractive index increases with increase in wavelengthB) Refractive index decreases with decrease in wavelengthC) Refractive index decreases with increase in wavelengthD) Refractive index increases with decrease in wavelength
Answer» ANSWER: Right answer:-A) Refractive INDEX INCREASES with INCREASE in WAVELENGTH

49.

Interpretation from the Graph:A) Refractive index increases with increase in wavelengthB) Refractive index decreases with decrease in wavelengthC) Refractive index decreases with increase in wavelengthD) Refractive index increases with decrease in wavelength

Answer»

ANSWER:

Right answer:-A) Refractive INDEX INCREASES with INCREASE in WAVELENGTH

Discussion

50.	identify at least one intellectual revolution theory. explain the significance of this theory in the development of science and technology and how it affects the society today.
Answer» ANSWER: I will SURELY answer ur QUESTION Explanation: but after few minutes

50.

identify at least one intellectual revolution theory. explain the significance of this theory in the development of science and technology and how it affects the society today.

Answer»

ANSWER:

I will SURELY answer ur QUESTION

Explanation:

but after few minutes

Discussion

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