67486 + Interview Questions in Secondary School in Physics

1.	On what factors does the resistance of a conductor depends
Answer» Explanation: resistance of a CONDUCTOR depends on 1 - lenght of conductor ( resistance is DIRECTLY proportional to length of conductor ) 2 - NATURE of material 3- area of cross section of conductor ( resistance is inversely proportional to the cross section area of conductor) 4- temprature ( INCREASE in TEMP increase in resistance)

1.

On what factors does the resistance of a conductor depends

Answer»

Explanation:

resistance of a CONDUCTOR depends on

1 - lenght of conductor ( resistance is DIRECTLY proportional to length of conductor )

2 - NATURE of material

3- area of cross section of conductor ( resistance is inversely proportional to the cross section area of conductor)

4- temprature ( INCREASE in TEMP increase in resistance)

Discussion

2.	Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct order of energy transformations that take place in a solar-powered car?
Answer» ANSWER: That is DEPEND on SOLAR POWER

2.

Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct order of energy transformations that take place in a solar-powered car?

Answer»

ANSWER:

That is DEPEND on SOLAR POWER

Discussion

3.	Please give me the answer ?don't message unnecessarily please
Answer» ANSWER: 3×10^5N/m^2 I HOPE it'll HELP you

3.

Please give me the answer ?don't message unnecessarily please

Answer»

ANSWER:

3×10^5N/m^2

I HOPE it'll HELP you

Discussion

4.	resistance of a metal wire of length 1m is 26ohm at 20degree C. if the diameter of the wire is 4m. what will be the resistivity of the metal at that temperature
Answer» ANSWER: EXPLANATION: resistivity=rho R=Resistivitylength/area area =PI[4/2]^2 GIVEN diameter=4m R=26 ohm 26=RESISTIVITY1/pi4 RESISTIVITY=26pi4=326.56

4.

resistance of a metal wire of length 1m is 26ohm at 20degree C. if the diameter of the wire is 4m. what will be the resistivity of the metal at that temperature

Answer»

ANSWER:

EXPLANATION:

resistivity=rho

R=Resistivity*length/area

area =PI*[4/2]^2 GIVEN diameter=4m

R=26 ohm

26=RESISTIVITY*1/pi*4

RESISTIVITY=26*pi*4=326.56

Discussion

5.	Question:-I whyfocusthe image of distant objectof objective lens.forms at
Answer» RETINA............................

Discussion

6.	An electric kettle of 1000W is used for 10 minutes and cost of energy is atRs. 5 per kWh. What is the cost of energy?
Answer» Answer: 5/6 Rs. Explanation: Power used buy ELECTRIC kettle=1000W =1kW TIME for which electric kettle is used=10 min =1/6 hr. Energy=powertime =11/6 KWH 1/6 kWh cost of 1 kWh = Rs. 5 cost of 1/6kWh=5/6 Rs

6.

An electric kettle of 1000W is used for 10 minutes and cost of energy is atRs. 5 per kWh. What is the cost of energy?

Answer»

Answer:

5/6 Rs.

Explanation:

Power used buy ELECTRIC kettle=1000W

=1kW

TIME for which electric kettle is used=10 min

=1/6 hr.

Energy=power*time

=1*1/6 KWH

1/6 kWh

cost of 1 kWh = Rs. 5

cost of 1/6kWh=5/6 Rs

Discussion

7.	If the charge of an electron is 1.6x10^-19, find the approximate number of electrons in 3c
Answer» ANSWER: Q=NE Explanation: Q=NE;Where,Q=total CHARGE N=number of ELECTRONS E= charge of an electron=1.610^-19 Here, 3C=N1.610^-19 N=310^19/1.6 =1.875*10^19 electrons

7.

If the charge of an electron is 1.6x10^-19, find the approximate number of electrons in 3c

Answer»

ANSWER:

Q=NE

Explanation:

Q=NE;Where,Q=total CHARGE

N=number of ELECTRONS

E= charge of an electron=1.6*10^-19

Here,

3C=N*1.6*10^-19

N=3*10^19/1.6

=1.875*10^19 electrons

Discussion

8.	In a process, temperature and Volume of 1 mole of an ideal monoatomic gas are varied according to the relation VT=k where k is a constant. In this process, the temperature of gas is increased by ∆T. Amount of heat absorbed by gas is? 1) kR∆T/22) 2kR∆T/33) R∆T/24) 3kR∆T/2
Answer» Answer: 3) RΔT/2 Explanation: Firstly thanks for the nice question!! The process is described by VT=constant (K)---(2) Since this is no known ORDINARY process where a single ELEMENT is constant like adiabatic, ISOTHERMAL etc. ,This a polytropic process Since PV=RT =>T=PV/R---(1) From (1) and (2), PV²=constant WORK done by such a process is given by RΔT/(γ-1) Change in internal energy is given by fRΔT/2 Using ΔU=Q-W Q=ΔU+W =(3)RΔT/2 - RΔT/(2-1) Q= RΔT/2 [ NOTE : here W is negative due to work done on the gas] Hope this answer helped you :)

8.

In a process, temperature and Volume of 1 mole of an ideal monoatomic gas are varied according to the relation VT=k where k is a constant. In this process, the temperature of gas is increased by ∆T. Amount of heat absorbed by gas is? 1) kR∆T/22) 2kR∆T/33) R∆T/24) 3kR∆T/2

Answer»

Answer:

3) RΔT/2

Explanation:

Firstly thanks for the nice question!!

The process is described by VT=constant (K)---(2)

Since this is no known ORDINARY process where a single ELEMENT is constant like adiabatic, ISOTHERMAL etc. ,This a polytropic process

Since PV=RT =>T=PV/R---(1)

From (1) and (2),

PV²=constant

WORK done by such a process is given by RΔT/(γ-1)

Change in internal energy is given by fRΔT/2

Using ΔU=Q-W

Q=ΔU+W =(3)RΔT/2 - RΔT/(2-1)

Q= RΔT/2

[ NOTE : here W is negative due to work done on the gas]

Hope this answer helped you :)

Discussion

9.	The unit of resistivity is __
Answer» ANSWER: OHM is your answer broooo

9.

The unit of resistivity is __

Answer»

ANSWER:

OHM is your answer broooo

Discussion

10.	The nature of distance time graph is ___ when object has uniform motion. *
Answer» Answer: Hey mate here is UR answer ☺️❤️ _______❤️Straight line with slope❤️______ Hope it helps U mate ❤️☺️ If u like my answer MARK it as a brainlist ☺️☺️☺️❤️❤️ #brärsââß #❤️❤️❤️❤️

10.

The nature of distance time graph is ___ when object has uniform motion. *

Answer»

Answer:

Hey mate here is UR answer ☺️❤️

_❤️Straight line with slope❤️

Hope it helps U mate ❤️☺️

If u like my answer MARK it as a brainlist ☺️☺️☺️❤️❤️

#brärsââß #❤️❤️❤️❤️

Discussion

11.	The Ph of a solution of HCL is 4. This shows the solution is............... in nature.
Answer» Answer: the solution is ACIDIC. Explanation: according to the PH scale, anything having Ph 7 is neutral , LESS than 7 is acidic and more than 7 is basic.

11.

The Ph of a solution of HCL is 4. This shows the solution is............... in nature.

Answer»

Answer: the solution is ACIDIC.

Explanation: according to the PH scale, anything having Ph 7 is neutral , LESS than 7 is acidic and more than 7 is basic.

Discussion

12.	Calculate the angle1 degree in radian
Answer» ruusiwt8sututisfusjsgj

12.

Calculate the angle1 degree in radian

Answer»

ruusiwt8sututisfusjsgj

Discussion

13.	a light wave is incident on fixed plane mirror. this mirror starts rotating with angular acceleration of 360 rad/s2. so who is the reflected wave after 0.25 sec?
Answer» Answer: Angle TURNED by ray = twice of ANGULAR DISPLACEMENT $= 2 \times \frac{1}{2} \pi \times ( \frac{1}{4} ) {}^{2}$ $= 11.25$

13.

a light wave is incident on fixed plane mirror. this mirror starts rotating with angular acceleration of 360 rad/s2. so who is the reflected wave after 0.25 sec?

Answer»

Answer:

Angle TURNED by ray = twice of ANGULAR DISPLACEMENT

$= 2 \times \frac{1}{2} \pi \times ( \frac{1}{4} ) {}^{2}$

$= 11.25$

Discussion

14.	If the charge of an electron is 1.6x10-19 find the approximate number of electrons in 3c
Answer» If 1C has 1.6×10-19 Then 3C has 3×1.6×10-19 which is EQUAL to 4.8×10-19 I HOPE this HELPS ( ╹▽╹ )

14.

If the charge of an electron is 1.6x10-19 find the approximate number of electrons in 3c

Answer»

If 1C has 1.6×10-19

Then 3C has 3×1.6×10-19 which is EQUAL to 4.8×10-19

I HOPE this HELPS ( ╹▽╹ )

Discussion

15.	What is meant by saying that the potential difference between two points is 1v?
Answer» Answer: HEY mate here is your answer. Explanation: When 1 joule of work is done to move a charge of amount 1 coulomb from one place to another,then it is said that the potential difference between two points is 1 V or 1 VOLT. HOPE ITS HELPFUL.

15.

What is meant by saying that the potential difference between two points is 1v?

Answer»

Answer:

HEY mate here is your answer.

Explanation:

When 1 joule of work is done to move a charge of amount 1 coulomb from one place to another,then it is said that the potential difference between two points is 1 V or 1 VOLT.

HOPE ITS HELPFUL.

Discussion

16.	Savion listed the steps involved when nuclear power plants generate electricity.1 Nuclear reaction occurs.2 Nuclear energy is converted to radiant and thermal energy.3 Heat is used to generate steam. 4 Light and heat are released.5 Steam turns turbines.6 Mechanical energy is converted to electrical energy.Which best explains how to correct Savion’s error?a. In step 2, change “radiant and thermal ” to “chemical and mechanical.”b. Reorder the steps so that step 4 appears before step 3. c. Reorder the steps so that step 6 appears before step 5. d. In step 6, change “mechanical” to “thermal.”
Answer» In order to correct the error in savion’s STATEMENT the step 4 should appear before step 3 The correct order of steps invoved in generating electricity using nuclear POWER plants by savion are: Nuclear REACTION takes place. Nuclear energy gets converted into RADIANT and thermal energy. Light and heat energy are released. Heat energy is used to generate steam. Steam is used to turn turbine. Mechanical energy gets converted to electrical energy.

16.

Savion listed the steps involved when nuclear power plants generate electricity.1 Nuclear reaction occurs.2 Nuclear energy is converted to radiant and thermal energy.3 Heat is used to generate steam. 4 Light and heat are released.5 Steam turns turbines.6 Mechanical energy is converted to electrical energy.Which best explains how to correct Savion’s error?a. In step 2, change “radiant and thermal ” to “chemical and mechanical.”b. Reorder the steps so that step 4 appears before step 3. c. Reorder the steps so that step 6 appears before step 5. d. In step 6, change “mechanical” to “thermal.”

Answer»

In order to correct the error in savion’s STATEMENT the step 4 should appear before step 3

The correct order of steps invoved in generating electricity using nuclear POWER plants by savion are:

Nuclear REACTION takes place.
Nuclear energy gets converted into RADIANT and thermal energy.
Light and heat energy are released.
Heat energy is used to generate steam.
Steam is used to turn turbine.
Mechanical energy gets converted to electrical energy.

Discussion

17.	Explain why the answer is second option pls guys
Answer» I think it is because when the two Atoms REPEL each other the distance between them is MUCH bigger than the radius joining thier centers When the atoms are strongly attracted to each other the distance between them is either EQUAL to thier radius or smaller I hope this HELPS ( ╹▽╹ )

17.

Explain why the answer is second option pls guys

Answer»

I think it is because when the two Atoms REPEL each other the distance between them is MUCH bigger than the radius joining thier centers

When the atoms are strongly attracted to each other the distance between them is either EQUAL to thier radius or smaller

I hope this HELPS ( ╹▽╹ )

Discussion

18.	Calculate the resistance of 1m long copper wire of radius 1m. resistivity ofcopper wire = 1.72x 10 rise to minus 8.
Answer» Answer: The RESISTANCE of the COPPER wire = 5.48 * 10^-9 ohm. R = p * l / πr² R = 1.72 * 10^-8 * 1 / 3.14 1² R = 1.72 10^-8 / 3.14 R = 5.48 * 10^-9 ohm I HOPE IT WILL HELP YOU. If you like it then please mark it as BRAINLIEST Answer.

18.

Calculate the resistance of 1m long copper wire of radius 1m. resistivity ofcopper wire = 1.72x 10 rise to minus 8.

Answer»

Answer:

The RESISTANCE of the COPPER wire = 5.48 * 10^-9 ohm.

R = p * l / πr²

R = 1.72 * 10^-8 * 1 / 3.14 *1²

R = 1.72 * 10^-8 / 3.14

R = 5.48 * 10^-9 ohm

I HOPE IT WILL HELP YOU.

If you like it then please mark it as BRAINLIEST Answer.

Discussion

19.	_ and _ are also known as conducting tissue as they help in conduction of food and in plant
Answer» EXPLANATION: XYLEM and PHLOEM are the ANSWERS

19.

_ and _ are also known as conducting tissue as they help in conduction of food and in plant

Answer»

EXPLANATION:

XYLEM and PHLOEM are the ANSWERS

Discussion

20.	If the charge of an electron is 1.6x10 19 find the approximate number of electrons in 3c
Answer» Q = NE 3 C = N × 1.6 × 10^19 $\frac{3}{1.6 \times {10}^{19} } = 18 \times {10}^{19}$

20.

If the charge of an electron is 1.6x10 19 find the approximate number of electrons in 3c

Answer»

Q = NE

3 C = N × 1.6 × 10^19

$\frac{3}{1.6 \times {10}^{19} } = 18 \times {10}^{19}$

Discussion

21.	Determine the resistance of the carbon resistor where the colors are1. red,red,red,white2. yellow,violet,brown and gold
Answer» Answer: 2. YELLOW,VIOLET,BROWN and GOLD

21.

Determine the resistance of the carbon resistor where the colors are1. red,red,red,white2. yellow,violet,brown and gold

Answer»

Answer:

2. YELLOW,VIOLET,BROWN and GOLD

Discussion

22.	Hlooo.......What is the fate of the radiations which are released by the radioactive elements during their decaying process ???!!!
Answer» Explanation: heya....... ATOMIC DECAY ATOMIC DECAYWhen an atom of a radioisotope decays, it gives off some of its excess ENERGY as radiation in the form of gamma rays or fast-moving sub- atomic particles. If it decays with EMISSION of an alpha or beta PARTICLE, it becomes a new element. One can DESCRIBE the EMISSIONS as gamma, beta and alpha radiation. hope this helps.......☺️☺️ keep following ❤️❤️

22.

Hlooo.......What is the fate of the radiations which are released by the radioactive elements during their decaying process ???!!!

Answer»

Explanation:

heya.......

ATOMIC DECAY

ATOMIC DECAYWhen an atom of a radioisotope decays, it gives off some of its excess ENERGY as radiation in the form of gamma rays or fast-moving sub- atomic particles. If it decays with EMISSION of an alpha or beta PARTICLE, it becomes a new element. One can DESCRIBE the EMISSIONS as gamma, beta and alpha radiation.

hope this helps.......☺️☺️

keep following ❤️❤️

Discussion

23.	two charges say + q and+ 4q are away from each other where can i place the third charge such that the net force =0
Answer» INCOMPLETE question. INFORMATION required about the charge of 3 rd charge and the distance between the 2 CHARGES given. repost the question

23.

two charges say + q and+ 4q are away from each other where can i place the third charge such that the net force =0

Answer»

INCOMPLETE question.

INFORMATION required about the charge of 3 rd charge and the distance between the 2 CHARGES given.

repost the question

Discussion

24.	Write the energy conversion taking place in the following devicesA) Storage Battery (during charging)B) Induction cooker
Answer» ANSWER: STORAGE BATTERY (during cahrging)

24.

Write the energy conversion taking place in the following devicesA) Storage Battery (during charging)B) Induction cooker

Answer»

ANSWER:

STORAGE BATTERY (during cahrging)

Discussion

25.	Parts of plant we can eat
Answer» Answer: we can EAT different parts of different plants like we can eat stem of sugarcane root of potato leaf of SPINACH exactra Explanation: hope you UNDERSTAND

25.

Parts of plant we can eat

Answer»

Answer:

we can EAT different parts of different plants like we can eat stem of sugarcane root of potato leaf of SPINACH exactra

Explanation:

hope you UNDERSTAND

Discussion

26.	Why does hair of a person get straight vertically upward while he/she get an electric shock
Answer» ANSWER: This happens because our hair is neutral and we get an ELECTRIC shock , our hair get charges and START REPELLING from each other. Thus standing up vertically is just repulsion.

26.

Why does hair of a person get straight vertically upward while he/she get an electric shock

Answer»

ANSWER:

This happens because our hair is neutral and we get an ELECTRIC shock , our hair get charges and START REPELLING from each other. Thus standing up vertically is just repulsion.

Discussion

27.	A 150g cricket ballistic hit by a batsman with an initial velocity of 40m/s at an angle 60°with the horizontal . Find kinetic energy when it reaches its maximum height.
Answer» HYY Dude 30J Explanation: At maximum HEIGHT there is only horizontal component of velocity because there is no acceleration in x direction if we take this motion in x-y plane ,so as the ball has only horizontal velocity which is 20m/s then the K.E of the ball is=1/2×0.15×(20)²=30J May this helps you PLZ marked in BRAINLEST ANSWER

27.

A 150g cricket ballistic hit by a batsman with an initial velocity of 40m/s at an angle 60°with the horizontal . Find kinetic energy when it reaches its maximum height.

Answer»

HYY Dude

30J

Explanation:

At maximum HEIGHT there is only horizontal component of velocity because there is no acceleration in x direction if we take this motion in x-y plane ,so as the ball has only horizontal velocity which is 20m/s then the K.E of the ball is=1/2×0.15×(20)²=30J

May this helps you

PLZ marked in BRAINLEST ANSWER

Discussion

28.	Describe the borhs model of atom
Answer» Answer: ELECTRONS orbit the nucleus in orbits that have a set SIZE and energy. The energy of the orbit is related to its size. The LOWEST energy is found in the smallest orbit. Radiation is absorbed or emitted when an ELECTRON moves from one orbit to ANOTHER.

28.

Describe the borhs model of atom

Answer»

Answer:

ELECTRONS orbit the nucleus in orbits that have a set SIZE and energy.

The energy of the orbit is related to its size. The LOWEST energy is found in the smallest orbit.

Radiation is absorbed or emitted when an ELECTRON moves from one orbit to ANOTHER.

Discussion

29.	If vector a+ vector b= vector c then prove that a+ b= c
Answer» ANSWER: if we LET that a,b&c is same DIRECTION then we RIGHT that vector a +vector b = vector c

29.

If vector a+ vector b= vector c then prove that a+ b= c

Answer»

ANSWER:

if we LET that a,b&c is same DIRECTION then we RIGHT that vector a +vector b = vector c

Discussion

30.	A car travel a distance of 200km from delhi to ambala towards north in 5 hours calculate speed and velocity of car
Answer» DISTANCE=200km Time = 5 hrs Speed = distance/ time Speed = 200/5 Speed= 40km/h Velocity= speed/time Velocity= 40/ 5 Velocity=8km/hr2 I hope this HELPS ( ╹▽╹ )

30.

A car travel a distance of 200km from delhi to ambala towards north in 5 hours calculate speed and velocity of car

Answer»

DISTANCE=200km

Time = 5 hrs

Speed = distance/ time

Speed = 200/5

Speed= 40km/h

Velocity= speed/time

Velocity= 40/ 5

Velocity=8km/hr2

I hope this HELPS ( ╹▽╹ )

Discussion

31.	Explain the principal and working of an electric motor
Answer» Answer: An electric motor works on the PRINCIPAL of Force of Magnetic field on a Straight CURRENT Carrying Conductor Under the influence of magnetic field at EVERY HALF turn the direction of current of magnetic field is changed so that the axle keeps rotating

31.

Explain the principal and working of an electric motor

Answer»

Answer:

An electric motor works on the PRINCIPAL of Force of Magnetic field on a Straight CURRENT Carrying Conductor

Under the influence of magnetic field at EVERY HALF turn the direction of current of magnetic field is changed so that the axle keeps rotating

Discussion

32.	Which activity directly converts energy from the Sun into chemical energy?1- a snake lying on a sunny rock to keep warm2- a rabbit using energy from food it has eaten to run 3- a bean plant making its own food to grow4- a person burning firewood to cook food
Answer» Answer: 3- a BEAN plant MAKING its own FOOD to grow Explanation: A bean plant making its own food to grow. - directly converts ENERGY from the Sun into chemical energy.

32.

Which activity directly converts energy from the Sun into chemical energy?1- a snake lying on a sunny rock to keep warm2- a rabbit using energy from food it has eaten to run 3- a bean plant making its own food to grow4- a person burning firewood to cook food

Answer»

Answer:

3- a BEAN plant MAKING its own FOOD to grow

Explanation:

A bean plant making its own food to grow. - directly converts ENERGY from the Sun into chemical energy.

Discussion

33.	Name 2 units which have formulas but not dimension.
Answer» Explanation: Quantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they does not possess dimensional formulas. B a physical quntatity neither having units nor dimensions are trigonometric RATIOS,strain , SPECIFIC GRAVITY etc.May 24, 2015

33.

Name 2 units which have formulas but not dimension.

Answer»

Explanation:

Quantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they does not possess dimensional formulas. B a physical quntatity neither having units nor dimensions are trigonometric RATIOS,strain , SPECIFIC GRAVITY etc.May 24, 2015

Discussion

34.	how much energy is transferred by a 12volt power supply to each coulomb of charge which it moves around a circuit
Answer» ANSWER: 12 JOULES is the answer

34.

how much energy is transferred by a 12volt power supply to each coulomb of charge which it moves around a circuit

Answer»

ANSWER:

12 JOULES is the answer

Discussion

35.	A force acting on a body may do what to the body
Answer» ANSWER: If the BODY is at REST then it may make it in motion If the body is moving then it would stop the motion of the body It may CHANGE the direction of the body It may Change the shape of the body And many more *Hope* it helps *Please* Mark as brainliest**

35.

A force acting on a body may do what to the body

Answer»

ANSWER:

If the BODY is at REST then it may make it in motion
If the body is moving then it would stop the motion of the body
It may CHANGE the direction of the body
It may Change the shape of the body

And many more

Hope it helps

Please Mark as brainliest

Discussion

36.	What is an aperture in the lens?
Answer» ANSWER: Aperture can be defined as the opening in a lens through which LIGHT passes to ENTER the camera. It is expressed in f-numbers like f/1.4, f/2, f/2.8 and so on to EXPRESS the size of the lens opening, which can be controlled through the lens or the camera

36.

What is an aperture in the lens?

Answer»

ANSWER:

Aperture can be defined as the opening in a lens through which LIGHT passes to ENTER the camera. It is expressed in f-numbers like f/1.4, f/2, f/2.8 and so on to EXPRESS the size of the lens opening, which can be controlled through the lens or the camera

Discussion

37.	The bread dough rises because of
Answer» The bread dough rides due to the PRESENCE of CARBON dioxide . Carbon dioxide is released by yeast which CONVERTS the sugars present in the bread to FORM CO2 and energy I hope this helps ( ╹▽╹ )

37.

The bread dough rises because of

Answer»

The bread dough rides due to the PRESENCE of CARBON dioxide .

Carbon dioxide is released by yeast which CONVERTS the sugars present in the bread to FORM CO2 and energy

I hope this helps ( ╹▽╹ )

Discussion

38.	Relation between focal length , image and object distances
Answer» EXPLANATION: MARK me as BRAINLIEST..........

38.

Relation between focal length , image and object distances

Answer»

EXPLANATION:

MARK me as BRAINLIEST..........

Discussion

39.	State principal of superposition
Answer» Answer: The superposition principle states that when TWO or more waves overlap in space, the resultant DISTURBANCE is equal to the algebraic sum of the INDIVIDUAL disturbances. (This is sometimes violated for large disturbances; see below NONLINEAR interactions.)

39.

State principal of superposition

Answer»

Answer:

The superposition principle states that when TWO or more waves overlap in space, the resultant DISTURBANCE is equal to the algebraic sum of the INDIVIDUAL disturbances. (This is sometimes violated for large disturbances; see below NONLINEAR interactions.)

Discussion

40.	Which priority is used to flow of current
Answer» Answer: CURRENT is FLOW from high POTENTIAL to low potential. Explanation: hope the answer will help you

40.

Which priority is used to flow of current

Answer»

Answer:

CURRENT is FLOW from high POTENTIAL to low potential.

Explanation:

hope the answer will help you

Discussion

41.	A current of 50ma is drawn by filament of an electric bulb for 2min find the amount of electric charge that flows the circuit
Answer» Answer: I = 50× 10^-3 A t = 2 min = 120 s Q= ? I = Q/t Q = I ×t = 50 × 10^ -3 × 120 = 6 C amount of electric charge is 6 C

41.

A current of 50ma is drawn by filament of an electric bulb for 2min find the amount of electric charge that flows the circuit

Answer»

Answer:

I = 50× 10^-3 A

t = 2 min = 120 s

Q= ?

I = Q/t

Q = I ×t

= 50 × 10^ -3 × 120

= 6 C

amount of electric charge is 6 C

Discussion

42.	Please answer this question it's urgent ....... I will mark the answer as a brainliest who will answer first
Answer» Answer: 20 CM, Mark as BRAINLY. you said mark as brainly Explanation: c=2 f c=20 cm image of OBJECT at c is same as that of the object

42.

Please answer this question it's urgent ....... I will mark the answer as a brainliest who will answer first

Answer»

Answer:

20 CM, Mark as BRAINLY. you said mark as brainly

Explanation:

c=2 f

c=20 cm

image of OBJECT at c is same as that of the object

Discussion

43.	Can anyone help pls
Answer» ANSWER: the company has a long history with 3d for a few months of Corona and has been a since it is the BEST of all my years and I am not going anywhere else to MAKE a decision to do it myself because I don't want it is a problem with my car accident but he is a problem for the free POINTS

43.

Can anyone help pls

Answer»

ANSWER:

the company has a long history with 3d for a few months of Corona and has been a since it is the BEST of all my years and I am not going anywhere else to MAKE a decision to do it myself because I don't want it is a problem with my car accident but he is a problem for the free POINTS

Discussion

44.	1. If the magnification value is given as -1, then the image is __________a) Erect and magnified by 1 time b) Inverted and magnified by 1 timec) Erect and diminished by 1 time d) Inverted & diminished by 1 time
Answer» Answer: ERECT and diminished as the magnification factor is negative so the image will be smaller than the OBJECT SIZE

44.

1. If the magnification value is given as -1, then the image is __________a) Erect and magnified by 1 time b) Inverted and magnified by 1 timec) Erect and diminished by 1 time d) Inverted & diminished by 1 time

Answer»

Answer:

ERECT and diminished as the magnification factor is negative so the image will be smaller than the OBJECT SIZE

Discussion

45.	Howfind the velocity of a car which has mass. 500kgand momentum of 8000kgm/s.what is the velocity
Answer» Answer: 16m/s Explanation: mV is MOMENTUM so 8000=500v v=8000/500 v=16m/s

45.

Howfind the velocity of a car which has mass. 500kgand momentum of 8000kgm/s.what is the velocity

Answer»

Answer:

16m/s

Explanation:

m*V is MOMENTUM so

8000=500*v

v=8000/500

v=16m/s

Discussion

46.	Plzz solve this guyzzzz ..I m always thankful to u plzz.solve by explanation and. step by step...
Answer» Solution : _________________________________ Answer - 1) : ________________ ⏭ Given: ✏ A scooterist travels a certain distance with speed of 50kmph and returns back at the STARTING point with a speed of 40kmph. ⏭ To Find: Average speed Average velocity ⏭ Concept: ✏ Average speed is defined as the RATIO of total distance covered to the total time taken. ✏ Average velocity is defined as the ratio of total DISPLACEMENT to the total time taken. ⏭ Calculation: Average speed $\mapsto \sf \: \tt{ \red{v_{av} = \dfrac{2 \times v_1 \times v_2}{v_1 + v_2}}} \\ \\ \mapsto \sf \: v_{av} = \dfrac{2 \times 50 \times 40}{50 + 40} \\ \\ \mapsto \sf \: v_{av} = \frac{4000}{90} \\ \\ \mapsto \: \boxed{ \tt{ \pink{ \large{av. \: speed = 44.44 \: kmph}}}}$ Average velocity $\implies \sf \: \red{displacement = zero} \\ \\ \because \sf \: \triangle{position} = zero \\ \\ \implies \: \boxed{ \tt{ \blue{ \large{av. \: velocity = zero}}}}$ _________________________________ Answer - 2) : ________________ ⏭ Given: ✏ A cyclist moves a distance of 30m from POINTS A to B in a straight line towards east with a speed of 10mps. ✏ He then moves a distance of 40m from poinr B to C in north direction with a speed of 20mps. ✏ Please see the attachment for better understanding. ⏭ To Find: Average speed Average velocity ⏭ Calculation: Average speed $\implies\sf \: av.speed = \dfrac{total \: distance}{total \: time}\\ \\ \implies\sf \: av.speed = \dfrac{30+40}{5} = \dfrac{70}{5} \\ \\ \implies \boxed{\tt{\large{\green{av.speed = 14 \: mps}}}}$ Average velocity $\mapsto\sf \: av.velocity = \dfrac{displacement}{time} \\ \\ \mapsto\sf \: av.velocity =\dfrac {50}{5}\\ \\ \mapsto \: \boxed{\tt{\large{\orange{av.velocity = 10\: mps}}}}\: \sf{(towards \: AC)}$

46.

Plzz solve this guyzzzz ..I m always thankful to u plzz.solve by explanation and. step by step...

Answer»

Solution :

_________________________________

Answer - 1) :

________________

⏭ Given:

✏ A scooterist travels a certain distance with speed of 50kmph and returns back at the STARTING point with a speed of 40kmph.

⏭ To Find:

Average speed
Average velocity

⏭ Concept:

✏ Average speed is defined as the RATIO of total distance covered to the total time taken.

✏ Average velocity is defined as the ratio of total DISPLACEMENT to the total time taken.

⏭ Calculation:

Average speed

$\mapsto \sf \: \tt{ \red{v_{av} = \dfrac{2 \times v_1 \times v_2}{v_1 + v_2}}} \\ \\ \mapsto \sf \: v_{av} = \dfrac{2 \times 50 \times 40}{50 + 40} \\ \\ \mapsto \sf \: v_{av} = \frac{4000}{90} \\ \\ \mapsto \: \boxed{ \tt{ \pink{ \large{av. \: speed = 44.44 \: kmph}}}}$

Average velocity

$\implies \sf \: \red{displacement = zero} \\ \\ \because \sf \: \triangle{position} = zero \\ \\ \implies \: \boxed{ \tt{ \blue{ \large{av. \: velocity = zero}}}}$

_________________________________

Answer - 2) :

________________

⏭ Given:

✏ A cyclist moves a distance of 30m from POINTS A to B in a straight line towards east with a speed of 10mps.

✏ He then moves a distance of 40m from poinr B to C in north direction with a speed of 20mps.

✏ Please see the attachment for better understanding.

⏭ To Find:

Average speed
Average velocity

⏭ Calculation:

Average speed

$\implies\sf \: av.speed = \dfrac{total \: distance}{total \: time}\\ \\ \implies\sf \: av.speed = \dfrac{30+40}{5} = \dfrac{70}{5} \\ \\ \implies \boxed{\tt{\large{\green{av.speed = 14 \: mps}}}}$

Average velocity

$\mapsto\sf \: av.velocity = \dfrac{displacement}{time} \\ \\ \mapsto\sf \: av.velocity =\dfrac {50}{5}\\ \\ \mapsto \: \boxed{\tt{\large{\orange{av.velocity = 10\: mps}}}}\: \sf{(towards \: AC)}$

Discussion

47.	One volte is equal to ......?
Answer» Answer: 1volte= Explanation: is EQUAL to 1joule of electrical potential energy per 1 COULOMB of electric charge...

47.

One volte is equal to ......?

Answer»

Answer:

1volte=

Explanation:

is EQUAL to 1joule of electrical potential energy per 1 COULOMB of electric charge...

Discussion

48.	એક પ્રકાશ તરંગ સ્થિર સમતલ અરીસા પર આપાત થાય છે.આ અરીસો 360 rads-2 ના કોણીય પ્રવેગથી ભ્રમણ કરવાનુંચાલુ કરે છે. તો પs બાદ પરાવર્તિત તરંગ કેટલા કોણે બ્રમણથયો હશે.(1) 90° (2) 45° (3) 22.5° (4) 11.25
Answer» SORRY I didn't UNDERSTAND your question Properly. Sorry dear I don't KNOW your question's Answer Properly Because I am a little girl Please Please Please Please Mark me as BRAINLIEST Answer and say thanks Also. I am your small sister dear Please. LOTS of LOVE and care for you from your small sister.

48.

એક પ્રકાશ તરંગ સ્થિર સમતલ અરીસા પર આપાત થાય છે.આ અરીસો 360 rads-2 ના કોણીય પ્રવેગથી ભ્રમણ કરવાનુંચાલુ કરે છે. તો પs બાદ પરાવર્તિત તરંગ કેટલા કોણે બ્રમણથયો હશે.(1) 90° (2) 45° (3) 22.5° (4) 11.25

Answer»

SORRY I didn't UNDERSTAND your question Properly.

Sorry dear I don't KNOW your question's Answer Properly Because I am a little girl Please Please Please Please Mark me as BRAINLIEST Answer and say thanks Also. I am your small sister dear Please.

LOTS of LOVE and care for you from your small sister.

Discussion

49.	A house has 1 bulb of 40W, one fan of 60W 1 refrigerator of 250W. They are used 8 hours per day. What is the cost of energy for 30 days at Rs. 8 per kWh?
Answer» ANSWER: The answer to this question is = Rs 672 Explanation: Total power used in one day = (40 + 60 + 250) * 8 = 350 * 8 = 2800 W H = 2.8 KWh The power used in 30 days = 2.8 * 30 = 84 KWh Therefore The cost = 84 * 8 = Rs 672 I HOPE IT WILL HELP YOU. If you like it PLEASE mark it as Brainliest Answer

49.

A house has 1 bulb of 40W, one fan of 60W 1 refrigerator of 250W. They are used 8 hours per day. What is the cost of energy for 30 days at Rs. 8 per kWh?

Answer»

ANSWER:

The answer to this question is = Rs 672

Explanation:

Total power used in one day =

(40 + 60 + 250) * 8

= 350 * 8

= 2800 W H

= 2.8 KWh

The power used in 30 days = 2.8 * 30

= 84 KWh

Therefore The cost = 84 * 8 = Rs 672

I HOPE IT WILL HELP YOU.

If you like it PLEASE mark it as Brainliest Answer

Discussion

50.	Find the first derivative and second derivative of given functions w.r.t. the independent variable x.7. y = nx2 + sin x
Answer» Answer:56 Explanation:

50.

Find the first derivative and second derivative of given functions w.r.t. the independent variable x.7. y = nx2 + sin x

Answer»

Answer:56

Explanation:

Discussion

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