67486 + Interview Questions in Secondary School in Physics

1.	Usha Swims in a 90 m long pool.She covers 180 m in one minute byswimming from one end to the other andBack along the same straight path. Findthe average speed and average velocityof Usha.
Answer» Answer: 135 Explanation: by ADDING both the DIGITS and DIVIDING them with 2

1.

Usha Swims in a 90 m long pool.She covers 180 m in one minute byswimming from one end to the other andBack along the same straight path. Findthe average speed and average velocityof Usha.

Answer»

Answer:

135

Explanation:

by ADDING both the DIGITS and DIVIDING them with 2

Discussion

2.	Why aren't my magnets repelling even though they are facing the same poles
Answer» Answer: *Answer:the reason is that MAGNET attract each other when the poles WOULD be different* *Answer:the reason is that magnet attract each other when the poles would be different HOPE it helps you please MARK it brainliest*

2.

Why aren't my magnets repelling even though they are facing the same poles

Answer»

Answer:

Answer:the reason is that MAGNET attract each other when the poles WOULD be different

Answer:the reason is that magnet attract each other when the poles would be different HOPE it helps you please MARK it brainliest

Discussion

3.	A Ray of light refracting through the concave spherical surface then the image formed may be______
Answer» REAL, INVERTED ..... ......

3.

A Ray of light refracting through the concave spherical surface then the image formed may be______

Answer»

REAL, INVERTED

.....

......

Discussion

4.	List few things around you which is matter
Answer» Table , chair , AIR , WATER etc.... Hope it HELPS you

4.

List few things around you which is matter

Answer»

Table , chair , AIR , WATER etc....

Hope it HELPS you

Discussion

5.	Refer to the attachment ! please it's urgent
Answer» EXPLANATION: R= u²sin2x/g u²= GR/ sin2x mu²/2= mgR/ 2sin2x KE= mgR/2sin2x KEmax=> sin2x is to be min= - 1 KEmax= -mgR/2 here m and g have constant value therefore for Max KE RANGE should be half of it's max value. hence range = R/2 for Max K E this (c) is CORRECT.

5.

Refer to the attachment ! please it's urgent

Answer»

EXPLANATION:

R= u²sin2x/g

u²= GR/ sin2x

mu²/2= mgR/ 2sin2x

KE= mgR/2sin2x

KEmax=> sin2x is to be min= - 1

KEmax= -mgR/2

here m and g have constant value

therefore for Max KE RANGE should be half of it's max value.

hence range = R/2 for Max K E this (c) is CORRECT.

Discussion

6.	What are weeds? why should wheat be removed?
Answer» Answer: WEEDS are unwanted PLANT . It's important to rid your GARDEN of weeds because they rob your soil and your plants of important NUTRIENTS and WATER

6.

What are weeds? why should wheat be removed?

Answer»

Answer:

WEEDS are unwanted PLANT .

It's important to rid your GARDEN of weeds because they rob your soil and your plants of important NUTRIENTS and WATER

Discussion

7.	Acceleration=A. (v-u) tB. (v-u)+tC. (v-u)/tD.None
Answer» Answer: ACCELERATION = V - u / t hope it helps you

7.

Acceleration=A. (v-u) tB. (v-u)+tC. (v-u)/tD.None

Answer»

Answer:

ACCELERATION = V - u / t

hope it helps you

Discussion

8.	If radius of curvature of a convex mirror is 40cm and image is formed at a distance of 15cm from the mirror then calculate object distance magnification and nature of the image
Answer» R = 40 cm, f = R/2 = 20 cm, v = 15 cm 1/f = 1/v + 1/u 1/u = 1/f - 1/v 1/u = 1/20 - 1/15 1/u = (3 - 4)/60 1/u = -1/60 ∴ u = -60 cm : Ans m = - v/u = -15/-60 = +1/4 : Ans Hope I HELPED

8.

If radius of curvature of a convex mirror is 40cm and image is formed at a distance of 15cm from the mirror then calculate object distance magnification and nature of the image

Answer»

R = 40 cm, f = R/2 = 20 cm, v = 15 cm

1/f = 1/v + 1/u

1/u = 1/f - 1/v

1/u = 1/20 - 1/15

1/u = (3 - 4)/60

1/u = -1/60

∴ u = -60 cm : Ans

m = - v/u = -15/-60 = +1/4 : Ans

Hope I HELPED

Discussion

9.	When does light behave as a wave?
Answer» light is an ELECTROMAGNETIC WAVE where the MAGNETIC wave and electric wave feeds each other wave NATURE of light is a prprty of light these things SHOW it has a wave nature: refraction reflection defraction polarisation interference

9.

When does light behave as a wave?

Answer»

light is an ELECTROMAGNETIC WAVE where the MAGNETIC wave and electric wave feeds each other

wave NATURE of light is a prprty of light

these things SHOW it has a wave nature:

refraction

reflection

defraction

polarisation

interference

Discussion

10.	Which type of friction force is least and why?
Answer» Answer: ROLLING FRICTION the FORCE which resists the motion of a ball or wheel and is the weakest types of friction.

10.

Which type of friction force is least and why?

Answer»

Answer:

ROLLING FRICTION

the FORCE which resists the motion of a ball or wheel and is the weakest types of friction.

Discussion

11.	The velocity of a body changes if it's ___or__ or both changes with time........
Answer» ANSWER: SPEED or distance i HOPE it is CORRECT

11.

The velocity of a body changes if it's _or or both changes with time........

Answer»

ANSWER:

SPEED or distance

i HOPE it is CORRECT

Discussion

12.	Name the parts of plant which develop into new plants by vegetative propagation.
Answer» BUD The EYE (as we CALL it) of the POTATO is an EXAMPLE of bud

12.

Name the parts of plant which develop into new plants by vegetative propagation.

Answer»

BUD

The EYE (as we CALL it) of the POTATO is an EXAMPLE of bud

Discussion

13.	Define matter in full statement
Answer» HERE IS YOUR ANSWER...☺❤ A DEFINITION of "matter" more fine-scale than the atoms and moleculesdefinition is: matter is MADE up of what atoms and molecules are made of, meaning anything made of positively CHARGED protons, neutral neutrons, and negatively charged electrons HOPE IT HELPS YOU ❤ MARK AS BRAINLIST ANSWER ❤ FOLLOW ME ❤

13.

Define matter in full statement

Answer»

HERE IS YOUR ANSWER...☺❤

A DEFINITION of "matter" more fine-scale than the atoms and moleculesdefinition is: matter is MADE up of what atoms and molecules are made of, meaning anything made of positively CHARGED protons, neutral neutrons, and negatively charged electrons

HOPE IT HELPS YOU ❤

MARK AS BRAINLIST ANSWER ❤

FOLLOW ME ❤

Discussion

14.	Why is a string instrument such as guitar, violin etc. provided with a hollow box?? Give reason. (Physics- Sound)
Answer» Answer: Musical instruments like guitar are PROVIDED with a hollow BOX so that when the strings are set into vibration, FORCED vibrations are produced in box. Since the box has a large area, it SETS a large volume of air into vibration which produces a loud sound of same frequency as that of the string Explanation: PLEASE MARK ME AS BRAINLIEST and LIKE ME PLEASE

14.

Why is a string instrument such as guitar, violin etc. provided with a hollow box?? Give reason. (Physics- Sound)

Answer»

Answer:

Musical instruments like guitar are PROVIDED with a hollow BOX so that when the strings are set into vibration, FORCED vibrations are produced in box. Since the box has a large area, it SETS a large volume of air into vibration which produces a loud sound of same frequency as that of the string

Explanation:

PLEASE MARK ME AS BRAINLIEST and LIKE ME PLEASE

Discussion

15.	The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is?
Answer» POLYESTER Explanation: a MAIN types of polyester is used in, a king JARS that is (PET )

15.

The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is?

Answer»

POLYESTER

Explanation:

a MAIN types of polyester is used in, a king JARS that is (PET )

Discussion

16.	A lemon kept in water in a glass tumbler appears to be brighter than its actual size when viewed from the sides because _____________________
Answer» Answer: LIGHT WOULD bend TOWARDS the normal.

16.

A lemon kept in water in a glass tumbler appears to be brighter than its actual size when viewed from the sides because _____________________

Answer»

Answer:

LIGHT WOULD bend TOWARDS the normal.

Discussion

17.	Q : The specific heat of water in Joule per mol per Kelvin is : ( J/mol k)a) 75 b) 77 C) 78 d) 79
Answer» ANSWER: $\huge\bold\red{hello}$ EXPLANATION: $75 is your answer$

17.

Q : The specific heat of water in Joule per mol per Kelvin is : ( J/mol k)a) 75 b) 77 C) 78 d) 79

Answer»

ANSWER:

$\huge\bold\red{hello}$

EXPLANATION:

$75 is your answer$

Discussion

18.	If acceleration due to gravity at distance d[< R]from the centre of earth is B, then its value atdistance d above the surface of earth will be [whereR is radius of earth]BR2(1) BR^2/(R+D)^3(2) BR/2d(3)Bd/ (R+ d)^2?(4)BR^3/d(R+ d)^2
Answer» Answer: VALUE of ACC. DUE to gravity DECREASE with increase in height

18.

If acceleration due to gravity at distance d[< R]from the centre of earth is B, then its value atdistance d above the surface of earth will be [whereR is radius of earth]BR2(1) BR^2/(R+D)^3(2) BR/2d(3)Bd/ (R+ d)^2?(4)BR^3/d(R+ d)^2

Answer»

Answer:

VALUE of ACC. DUE to gravity DECREASE with increase in height

Discussion

19.	a circular loop of wire of radius 5/Π cm is suspended from 1 arm of a balance the plane of the loop is in contact with the surface of soap solution the pull on the loop due to surface tension is found to be 0.8x10^-3 kg weight calculate surface tension of soap solution
Answer» Given: A circular loop of wire of radius $\mathbf{\frac{5}{\pi } \ cm}$ is suspended from 1 ARM of a balance the plane of the loop is in contact with the surface of soap solution the pull on the loop due to surface tension is FOUND to be $\mathbf{0.8\times 10^{-3}\ \ \frac{N}{m}}$ . To FIND: What is weight calculated due to surface tension of soap solution? Solution: $\mathbf{\textrm{Surface tension of soap solution}(\sigma )=0.8\times 10^{-3} \ \frac{N}{m}}$ $\mathbf{\textrm{Radius of soap solution}(R )=\dfrac{5}{\pi } \ \ \ \ \ \ \ (cm)}$ We can also write: $\mathbf{\textrm{Radius of soap solution}(R )=\dfrac{5\times 10^{-2}}{\pi } \ \ \ \ (m)}$ We know the formula of relation between FORCE and surface tension: Force = Surface tension× Length Here length is circumference of soap wire circular loop: $\mathbf{\textrm{Force due to surface tension}(F )=\sigma \times (2\times \pi \times R) }$ On putting respective value in above equation: $\mathbf{\textrm{Force due to surface tension}(F )=0.8\times 10^{-3} \times 2\times \pi \times \dfrac{5\times 10^{-2}}{\pi } }$ $\mathbf{\textrm{Force due to surface tension}(F )=8\times 10^{-5} \ \ \ \ \ (N) }$ Force due to surface tension is same as weight due to surface tension which value is $\mathbf{8\times 10^{-5} \ (N) }$ .

19.

a circular loop of wire of radius 5/Π cm is suspended from 1 arm of a balance the plane of the loop is in contact with the surface of soap solution the pull on the loop due to surface tension is found to be 0.8x10^-3 kg weight calculate surface tension of soap solution

Answer»

Given:

A circular loop of wire of radius $\mathbf{\frac{5}{\pi } \ cm}$ is suspended from 1 ARM of a balance the plane of the loop is in contact with the surface of soap solution the pull on the loop due to surface tension is FOUND to be $\mathbf{0.8\times 10^{-3}\ \ \frac{N}{m}}$ .

To FIND:

What is weight calculated due to surface tension of soap solution?

Solution:

$\mathbf{\textrm{Surface tension of soap solution}(\sigma )=0.8\times 10^{-3} \ \frac{N}{m}}$

$\mathbf{\textrm{Radius of soap solution}(R )=\dfrac{5}{\pi } \ \ \ \ \ \ \ (cm)}$

We can also write:

$\mathbf{\textrm{Radius of soap solution}(R )=\dfrac{5\times 10^{-2}}{\pi } \ \ \ \ (m)}$

We know the formula of relation between FORCE and surface tension:

Force = Surface tension× Length

Here length is circumference of soap wire circular loop:

$\mathbf{\textrm{Force due to surface tension}(F )=\sigma \times (2\times \pi \times R) }$

On putting respective value in above equation:

$\mathbf{\textrm{Force due to surface tension}(F )=0.8\times 10^{-3} \times 2\times \pi \times \dfrac{5\times 10^{-2}}{\pi } }$

$\mathbf{\textrm{Force due to surface tension}(F )=8\times 10^{-5} \ \ \ \ \ (N) }$

Force due to surface tension is same as weight due to surface tension which value is $\mathbf{8\times 10^{-5} \ (N) }$ .

Discussion

20.	What do you mean by refractive index? what is Snell's law
Answer» ANSWER: Snell's LAW is defined as “The RATIO of the sine of the angle of incidence to the sine of the angle of refraction is a CONSTANT, for the light of a GIVEN colour and for the given pair of media”. mark me as brainliest

20.

What do you mean by refractive index? what is Snell's law

Answer»

ANSWER:

Snell's LAW is defined as “The RATIO of the sine of the angle of incidence to the sine of the angle of refraction is a CONSTANT, for the light of a GIVEN colour and for the given pair of media”.

mark me as brainliest

Discussion

21.	draw the situation in which a light ray changes its direction when it incident on a plane surface (I) rarer to denser (2)denser to rarer
Answer» SEE the FIGURE HOPE that is USEFUL

21.

draw the situation in which a light ray changes its direction when it incident on a plane surface (I) rarer to denser (2)denser to rarer

Answer»

SEE the FIGURE

HOPE that is USEFUL

Discussion

22.	I want the difference between parellel and series conection in table manner
Answer» EXPLANATION: Difference Between SERIES and Parallel Circuits. The major difference is that the series circuits have the same amount of CURRENT FLOW through all the COMPONENTS placed in it. ... On the other hand, in parallel circuits, the components are placed in parallel with each other. This circuit splits the current flow.

22.

I want the difference between parellel and series conection in table manner

Answer»

EXPLANATION:

Difference Between SERIES and Parallel Circuits. The major difference is that the series circuits have the same amount of CURRENT FLOW through all the COMPONENTS placed in it. ... On the other hand, in parallel circuits, the components are placed in parallel with each other. This circuit splits the current flow.

Discussion

23.	In the followning figure the electric field on y axis is maximum at y=
Answer» ANSWER: what is ELECTRIC FIELD??

23.

In the followning figure the electric field on y axis is maximum at y=

Answer»

ANSWER:

what is ELECTRIC FIELD??

Discussion

24.	The velocity of a body changes if it's ___or___.
Answer» ANSWER: aceelerate or retarted

24.

The velocity of a body changes if it's _or_.

Answer»

ANSWER:

aceelerate or retarted

Discussion

25.	How do you find the center of curvature of a curved refracting surface
Answer» ANSWER: R=2f 1/f=1/v+1/u Explanation:

25.

How do you find the center of curvature of a curved refracting surface

Answer»

ANSWER:

R=2f

1/f=1/v+1/u

Explanation:

Discussion

26.	WORKSHEET - 12A solid sphere and a hollow sphere of same material have same mass. When they are heated by50°C, increase in volume of solid sphere is 5c.c. The expansion of hollow sphere is [ ]a) 5 c.c.b) morethan 5 c.c. c) lessthan 5 c.c. d) none
Answer» ANSWER: Google SE dekh le bhai Google me search karega bhai to answer khud hi mil jayega OK!!!! I hope u UNDERSTAND what I say!!

26.

WORKSHEET - 12A solid sphere and a hollow sphere of same material have same mass. When they are heated by50°C, increase in volume of solid sphere is 5c.c. The expansion of hollow sphere is [ ]a) 5 c.c.b) morethan 5 c.c. c) lessthan 5 c.c. d) none

Answer»

ANSWER:

Google SE dekh le bhai

Google me search karega bhai to answer khud hi mil jayega

OK!!!!

I hope u UNDERSTAND what I say!!

Discussion

27.	The longitudinal magnification at refracting curved surface mL
Answer» Answer: Longitudinal MAGNIFICATION denotes the FACTOR by which an image increases in size, as measured along the optical axis. Angular magnification is equal to the ratio of the tangents of the ANGLES SUBTENDED by an object and its image when measured from a given point in… Explanation: We know that the lateral (transverse or LINEAR) magnification is defined as the ratio of the height of the image to the height of the object. On the other hand, the longitudinal magnification is defined as the ratio of the width of the image to that of the object.

27.

The longitudinal magnification at refracting curved surface mL

Answer»

Answer:

Longitudinal MAGNIFICATION denotes the FACTOR by which an image increases in size, as measured along the optical axis. Angular magnification is equal to the ratio of the tangents of the ANGLES SUBTENDED by an object and its image when measured from a given point in…

Explanation:

We know that the lateral (transverse or LINEAR) magnification is defined as the ratio of the height of the image to the height of the object. On the other hand, the longitudinal magnification is defined as the ratio of the width of the image to that of the object.

Discussion

28.	1ml of glacial acetic acid and 1ml of ethanolare mixed together few drops a consentanatedSulphric acid is add to mixture andwained in a water bath of 5ml
Answer» ANSWER: I don't know.hope it HELPS YA.

28.

1ml of glacial acetic acid and 1ml of ethanolare mixed together few drops a consentanatedSulphric acid is add to mixture andwained in a water bath of 5ml

Answer»

ANSWER:

I don't know.hope it HELPS YA.

Discussion

29.	Check whether the following equation is dimensionally correct. Check whether the following equation is dimensionally correct- 1/2mv^2 = mgh
Answer» FOLLOW ME FOR CLEARING YOUR NEXT DOUBT

Discussion

30.	The lateral magnification or transverse magnification (m)at refracting curved surface is ______
Answer» ANSWER: LENGTH of image / length of object =LATERAL magnification [m] EXPLANATION:

30.

The lateral magnification or transverse magnification (m)at refracting curved surface is ______

Answer»

ANSWER:

LENGTH of image / length of object =LATERAL magnification [m]

EXPLANATION:

Discussion

31.	a conductor is in form of solid rod of outer radius is R and thickness is R/4 .If length of rod is L and resistivity is P then resistance
Answer» ANSWER: R=16PL/15πR^2 Explanation: RESISTANCE,R= PL/A and A = πR^2 -πR^2/4 =15πR^2/16 now R = 16PL/15πR^2

31.

a conductor is in form of solid rod of outer radius is R and thickness is R/4 .If length of rod is L and resistivity is P then resistance

Answer»

ANSWER:

R=16PL/15πR^2

Explanation:

RESISTANCE,R= PL/A

and A = πR^2 -πR^2/4

=15πR^2/16

now R = 16PL/15πR^2

Discussion

32.	What is weight of 10kg wood on surface of sun? only for Geniuses
Answer» we know that, weight of the object (W) = mass(m)X acceleration due to gravity (g) In the question It is given that weight of wood on earth is 10 KG so here we have to find its mass. so divide 10/10 = 1 i DIVIDED the weight by 10 because the force of attraction due to gravity on earth is 10 m/s^2. so , we now came to know the mass i.e. 1 kg acceleration due to gravity on sun = 274.13m/s^2 ( approximately) hence , using the FORMULA , weight = mass X acceleration due to gravity ( sun) = 1 kg × 274.13m/s^2 = 274 kgs ( approximately) so the weight on the surface of the sun is 274 kgs.

32.

What is weight of 10kg wood on surface of sun? only for Geniuses

Answer»

we know that,

weight of the object (W) = mass(m)X acceleration due to gravity (g)

In the question

It is given that weight of wood on earth is 10 KG

so here we have to find its mass.

so divide 10/10 = 1

i DIVIDED the weight by 10 because the force of

attraction due to gravity on earth is 10 m/s^2.

so , we now came to know the mass i.e. 1 kg

acceleration due to gravity on sun = 274.13m/s^2 ( approximately)

hence ,

using the FORMULA ,

weight = mass X acceleration due to gravity ( sun)

= 1 kg × 274.13m/s^2

= 274 kgs ( approximately)

so the weight on the surface of the sun is 274 kgs.

Discussion

33.	Precautions in using clinical thermometer?
Answer» Answer: .. Explanation: *precautions* are very imaportant such as .. dont bite the clinical thermometer ..KEEP thermometer under the tongue ..wait for 2 mins after PUTTING it <U>thanks this WIL help** u

33.

Precautions in using clinical thermometer?

Answer»

Answer:

..

Explanation:

precautions are very imaportant such as

.. dont bite the clinical thermometer

..KEEP thermometer under the tongue

..wait for 2 mins after PUTTING it

<U>thanks this WIL help u

Discussion

34.	54. A car starting from rest and moving along a straightpath with uniform acceleration covers distances pand q in the first two successive equal intervals oftime. Find the ratio of p to q.pearson foundation
Answer» <P>Answer: p/q = 1/3 Explanation: Given that CAR is starting from rest i.e u = 0 Consider the given time interval = t Let the distance traveled in first interval of time is x₁ i.e p = x₁ Let the distance traveled in two time intervals is x₂ i.e q = x₂ - x₁. Now, lets use the NEWTONS second equation of motion. i.e s = ut + 1/2 at² => x₁ = 0 + 1/2 at² => p = 1/2 at². Then, x₂ = 0 + 1/2 a(2t)² => x₂ = 4/2 at² => x₂ = 2 at² so, q = x₂ - x₁ => q = 2 at² - 1/2 at² => q = 3/2 at². Now, p/q = (1/2 at²)/(3/2 at²) => p/q = 1/3

34.

54. A car starting from rest and moving along a straightpath with uniform acceleration covers distances pand q in the first two successive equal intervals oftime. Find the ratio of p to q.pearson foundation

Answer»

<P>Answer:

p/q = 1/3

Explanation:

Given that CAR is starting from rest i.e u = 0

Consider the given time interval = t

Let the distance traveled in first interval of time is x₁

i.e p = x₁

Let the distance traveled in two time intervals is x₂

i.e q = x₂ - x₁.

Now, lets use the NEWTONS second equation of motion.

i.e s = ut + 1/2 at²

=> x₁ = 0 + 1/2 at²

=> p = 1/2 at².

Then,

x₂ = 0 + 1/2 a(2t)²

=> x₂ = 4/2 at²

=> x₂ = 2 at²

so, q = x₂ - x₁

=> q = 2 at² - 1/2 at²

=> q = 3/2 at².

Now, p/q = (1/2 at²)/(3/2 at²)

=> p/q = 1/3

Discussion

35.	B)Velocity of a body is its rate of _____.....
Answer» Answer: change distance PER UNIT time in GIVEN DIRECTION

35.

B)Velocity of a body is its rate of _____.....

Answer»

Answer:

change distance PER UNIT time in GIVEN DIRECTION

Discussion

36.	if an object moves along a circular path of radius 2m and complete 1½ revolution the its displacement is ___________
Answer»

Discussion

37.	What is transformer? Mention two sources of energy loss in a transformer....
Answer» ong>ANSWER: . Heat losses and 2. Eddy currents in the PRIMARY and secondary conductors of the transformer. Heat losses, or I SQUARED R losses, in the winding MATERIALS contribute the largest part of the load losses.

37.

What is transformer? Mention two sources of energy loss in a transformer....

Answer»

ong>ANSWER:

. Heat losses and 2. Eddy currents in the PRIMARY and secondary conductors of the transformer. Heat losses, or I SQUARED R losses, in the winding MATERIALS contribute the largest part of the load losses.

Discussion

38.	Explain the current and senstivities of moving coil galvano meter
Answer» ong>Answer: *SORRY* *ICAN* *not* *understand* *the* *QUESTION*

38.

Explain the current and senstivities of moving coil galvano meter

Answer»

ong>Answer:

SORRY ICAN not understand the QUESTION

Discussion

39.	a maximum power transfer from a circuit to a load resistance is 150watt and load current is 6amp find circuit resistance
Answer» ONG>ANSWER: i djdkled jdjdjfjf uhrjfjdkrb hdjdjfidkf jejejdkekek djjdjsjdkdkdkd dkkdkjdjdjd jjsjdjdj jdjdjdjfj jsjdjdjdjdj jsjdjdjdjdj jdidbdhd didibrrjif iiebrurubr dhurrhrur

Discussion

40.	How to find work function of a metal given light and potential difference
Answer» potential DIFFERENCE at which the PHOTOCURRENT stops FLOWING is ... Figure 6.3.1: An experimental SETUP to study the photoelectric ... This ENERGY ϕ is called the work function of the metal

Discussion

41.	6) A uniform chain of length L is kept on a table so that one- third of chain hangs freely from the edge of the table. Calculate the work done in pulling the chain back on the table. (3)
Answer» ONG>Answer: 3.6J is the answer Explanation: MARK me as BRAINLIEST

41.

6) A uniform chain of length L is kept on a table so that one- third of chain hangs freely from the edge of the table. Calculate the work done in pulling the chain back on the table. (3)

Answer» ONG>Answer:

3.6J is the answer

Explanation:

MARK me as BRAINLIEST

Discussion

42.	Choose the correct option to fill in the blank. 1. Abody is said to be(at rest/in motion) when its position changes withthe surroundings.
Answer» ong>Answer: in MOTION Explanation: as we KNOW if the body moves it should be in motion

42.

Choose the correct option to fill in the blank. 1. Abody is said to be(at rest/in motion) when its position changes withthe surroundings.

Answer»

ong>Answer:

in MOTION

Explanation:

as we KNOW if the body moves it should be in motion

Discussion

43.	What is the age of earth
Answer» > 4.543 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs .....

43.

What is the age of earth

Answer»

>

4.543 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs

.....

Discussion

44.	5. The size of mirror is indicated by its : focal lengthRadius of curvatureApertureNone of these
Answer» ONG>ANSWER: aperture Explanation: hope it helps you because focal length is half of distance of radius of curvature aperture is known as reflecting surface and they are not given but obvieosly this is right they SHOW that what is size of mirror hope it helps you mark as BRAINLIST

44.

5. The size of mirror is indicated by its : focal lengthRadius of curvatureApertureNone of these

Answer» ONG>ANSWER:

aperture

Explanation:

hope it helps you

because focal length is half of distance of radius of curvature

aperture is known as reflecting surface and they are not given but obvieosly this is right they SHOW that what is size of mirror

hope it helps you

mark as BRAINLIST

Discussion

45.	Paravliy darpan Kise Kahate Hain
Answer» ONG>ANSWER: hi good morning have a NICE DAY

45.

Paravliy darpan Kise Kahate Hain

Answer» ONG>ANSWER:

hi

good morning

have a NICE DAY

Discussion

46.	Draw the curved the surface and mark the centre of curvature, pole and principal axis
Answer» ong>Explanation: this is your answer OK it's not possible to make full PICTURE I am really SORRY

46.

Draw the curved the surface and mark the centre of curvature, pole and principal axis

Answer»

ong>Explanation:

this is your answer OK it's not possible to make full PICTURE I am really SORRY

Discussion

47.	What is the approximate length of a seconds (simple) pendulum on thesurface of moon? Given: 'g' at the moon= 1.6 m/s^2.
Answer» ong>ANSWER: 0.103m Explanation: Here is your answer if U GET the CONCEPT than mark this as a *BRAINLIEST*.

47.

What is the approximate length of a seconds (simple) pendulum on thesurface of moon? Given: 'g' at the moon= 1.6 m/s^2.

Answer»

ong>ANSWER:

0.103m

Explanation:

Here is your answer if U GET the CONCEPT than mark this as a BRAINLIEST.

Discussion

48.	Variable focal length of eye lens is responsible for: (a) accommodation of eye(b) persistence of vision(c) colour blindnessd) least distance of district vision
Answer» ONG>Answer: a) ACCOMMODATION of eye Explanation: power of accommodation of HUMAN eye is the ability of the eye to OBSERVE distinctly the object situated ar WIDELY different distances from the eye.

48.

Variable focal length of eye lens is responsible for: (a) accommodation of eye(b) persistence of vision(c) colour blindnessd) least distance of district vision

Answer» ONG>Answer:

a) ACCOMMODATION of eye

Explanation:

power of accommodation of HUMAN eye is the ability of the eye to OBSERVE distinctly the object situated ar WIDELY different distances from the eye.

Discussion

49.	3) Give the conditions for a ray to pass undeviated from one medium to another.
Answer» ONG>ANSWER: bhdjd Explanation: hshebbshjnwjaoejbdbduowks svdbidkdbdnksjshdbdbjdhdbdndkjabsnejehhdbehsjdjbdhdhdhbdhdudjjeenjdjdjejdbhdhsjwjbsvgdhdjejndidisnsbhdhdjsbbsjdjsj

49.

3) Give the conditions for a ray to pass undeviated from one medium to another.

Answer» ONG>ANSWER:

bhdjd

Explanation:

hshebbshjnwjaoejbdbduowks svdbidkdbdnksjshdbdbjdhdbdndkjabsnejehhdbehsjdjbdhdhdhbdhdudjjeenjdjdjejdbhdhsjwjbsvgdhdjejndidisnsbhdhdjsbbsjdjsj

Discussion

50.	What is nuclear energy.Explain it in 2 or 3 sentences with an example of peaceful and destructive uses.
Answer» ong>Answer: Nuclear power is the use of nuclear reactions that release nuclear ENERGY to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. Nuclear power can be OBTAINED from nuclear fission, nuclear DECAY and nuclear FUSION reactionsthe energy released during nuclear fission or fusion, especially when used to generate electricity

50.

What is nuclear energy.Explain it in 2 or 3 sentences with an example of peaceful and destructive uses.

Answer»

ong>Answer:

Nuclear power is the use of nuclear reactions that release nuclear ENERGY to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. Nuclear power can be OBTAINED from nuclear fission, nuclear DECAY and nuclear FUSION reactionsthe energy released during nuclear fission or fusion, especially when used to generate electricity

Discussion

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