13232 + Interview Questions in Physics Page 33 InterviewSolution

1601.	The path of a free electron in a metal is ___
Answer» The path of a free electron in a metal is ___

Discussion

1602.	A ray through the centre of curvature is incident on the spherical mirror makes an angle of _____ with the normal at that point.
Answer» A ray through the centre of curvature is incident on the spherical mirror makes an angle of _____ with the normal at that point.

Discussion

1603.	An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and the road if the vehicle is to be stopped with a negative acceleration of 1.7 m/s2 ?
Answer» An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and the road if the vehicle is to be stopped with a negative acceleration of $1.7$ $m / s^{2}$ ?

Discussion

1604.	two particle start simul†an eously from two point v and w with velocity 144km/hr and 252km/hr rspectivelybin th same direction along the line vw of length 36m and acceleration with 8m/s² and 4m/s²respectively if initially first particle is ahead of second particle then there metting time in seconds are options: (1)1&4 (2)2&3 (3)3&6 (4 2&4
Answer» two particle start simul†an eously from two point v and w with velocity 144km/hr and 252km/hr rspectivelybin th same direction along the line vw of length 36m and acceleration with 8m/s² and 4m/s²respectively if initially first particle is ahead of second particle then there metting time in seconds are options: (1)1&4 (2)2&3 (3)3&6 (4 2&4

Discussion

1605.	Power delivered by the source of the circuit becomes maximum, when
Answer» Power delivered by the source of the circuit becomes maximum, when

Discussion

1606.	Solve:(1) Ajit carries a load of 17 kg from the ground on his head and takes it to the height of 2 m from the ground. Calculate the work done by him. (333.2 J)(2) The velocity of a car increases from 54 km/hr to 72 km/hr. If the mass of the car is 1500 kg find the work done to increase the velocity. (131250 J)
Answer» Solve: (1) Ajit carries a load of 17 kg from the ground on his head and takes it to the height of 2 m from the ground. Calculate the work done by him. (333.2 J) (2) The velocity of a car increases from 54 km/hr to 72 km/hr. If the mass of the car is 1500 kg find the work done to increase the velocity. (131250 J)

1606.

Solve:(1) Ajit carries a load of 17 kg from the ground on his head and takes it to the height of 2 m from the ground. Calculate the work done by him. (333.2 J)(2) The velocity of a car increases from 54 km/hr to 72 km/hr. If the mass of the car is 1500 kg find the work done to increase the velocity. (131250 J)

Answer»

Solve:

(1) Ajit carries a load of 17 kg from the ground on his head and takes it to the height of 2 m from the ground. Calculate the work done by him. (333.2 J)

(2) The velocity of a car increases from 54 km/hr to 72 km/hr. If the mass of the car is 1500 kg find the work done to increase the velocity. (131250 J)

Discussion

1607.	State two properties of the medium on which the speed of sound in it depends.
Answer» State two properties of the medium on which the speed of sound in it depends.

Discussion

1608.	Write four characteristics of an ideal fuel
Answer» Write four characteristics of an ideal fuel

Discussion

1609.	A ball is launched from the top of Mt. Everest which is at elevation of 9000 m. The ball moves in circular orbit around earth. Acceleration due to gravity near the earth’s surface is g. The magnitude of the ball’s acceleration while in orbit is
Answer» A ball is launched from the top of Mt. Everest which is at elevation of 9000 m. The ball moves in circular orbit around earth. Acceleration due to gravity near the earth’s surface is g. The magnitude of the ball’s acceleration while in orbit is

Discussion

1610.	A planet has twice the density of earth but the acceleration due to gravity on its surface is exactly the same as on the surface of earth. Its radius in terms of radius of earth R will be:
Answer» A planet has twice the density of earth but the acceleration due to gravity on its surface is exactly the same as on the surface of earth. Its radius in terms of radius of earth R will be:

Discussion

1611.	Which of the following are properties of a sound wave?
Answer» Which of the following are properties of a sound wave?

Discussion

1612.	Identify the electrodes in the given diagram of an electric cell:
Answer» Identify the electrodes in the given diagram of an electric cell:

Discussion

1613.	Efficiency of a cyclic process is 50% and heat interactions are Q1=+1915 J, Q2=−40 J, Q3=+125 J and Q4=−Q J. Find the value of Q.
Answer» Efficiency of a cyclic process is $50 %$ and heat interactions are $Q_{1} = + 1915 J, Q_{2} = - 40 J, Q_{3} = + 125 J$ and $Q_{4} = - Q J$ . Find the value of $Q$ .

Discussion

1614.	In the given circuit-Would any of the bulb glow when the switch is in the 'OFF' position?What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?
Answer» In the given circuit- Would any of the bulb glow when the switch is in the 'OFF' position? What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?

Discussion

1615.	A TV set picture tube shoots out 6.25×1016 electrons in one second, then find the current flowing in the TV. (Charge of an electron is e=1.6×10−19 C)
Answer» A TV set picture tube shoots out $6.25 \times 10^{16}$ electrons in one second, then find the current flowing in the TV. (Charge of an electron is $e = 1.6 \times 10^{- 19} C)$

Discussion

1616.	What are uses of momentum? Only for 2 marks
Answer» What are uses of momentum? Only for 2 marks

Discussion

1617.	Why copper and Aluminium are used to make wires?
Answer» Why copper and Aluminium are used to make wires?

Discussion

1618.	What happens when a wet piece of cloth is shakened
Answer» What happens when a wet piece of cloth is shakened

Discussion

1619.	Figure X shows a trace of a sound wave produced by a particular tuning fork.(i) On the graph given in Figure Y, draw a trace of the sound wave which has a higher frequency than that shown in Figure X.(ii) On the graph paper shown in Figure Z, draw a trace of the sound wave which has a larger amplitude than that shown in Figure X
Answer» Figure X shows a trace of a sound wave produced by a particular tuning fork. (i) On the graph given in Figure Y, draw a trace of the sound wave which has a higher frequency than that shown in Figure X. (ii) On the graph paper shown in Figure Z, draw a trace of the sound wave which has a larger amplitude than that shown in Figure X

Discussion

1620.	A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between the boy and his image will be:
Answer» A boy is observing his image in a plane mirror. The distance between the mirror and his image is $6 m$ . If he moves $2 m$ towards the mirror, then the distance between the boy and his image will be:

Discussion

1621.	{ A point moves with uniform acceleration and }v_1,v_2 and }}{v_3 denote the average velocities in the three successive }}{ intervals of time }t_1,t_2 and }t_3. Which of the following }} relations is correct }{ 1. }(v_1-v_2):(v_2-v_3)=(t_1-t_2):(t_2+t_3)}{ 2. }(v_1-v_2):(v_2-v_3)=(t_1^\ast+t_2):(t_2+t_3)
Answer» { A point moves with uniform acceleration and }v_1,v_2 and }}{v_3 denote the average velocities in the three successive }}{ intervals of time }t_1,t_2 and }t_3. Which of the following }} relations is correct }{ 1. }(v_1-v_2):(v_2-v_3)=(t_1-t_2):(t_2+t_3)}{ 2. }(v_1-v_2):(v_2-v_3)=(t_1^\ast+t_2):(t_2+t_3)

Discussion

1622.	A ball of mass 20 g hits a wall at an angle of 45 degree with a velocity of 15 m/s. If the ball rebounds at 90 degree to the direction of incidence, calculate the impulse received by the ball??
Answer» A ball of mass 20 g hits a wall at an angle of 45 degree with a velocity of 15 m/s. If the ball rebounds at 90 degree to the direction of incidence, calculate the impulse received by the ball??

Discussion

1623.	The man of mass 50 kg is on the platform of mass 150 kg moving towards the left making a sound of frequency f0 as shown in the figure. The relative speed between the man and the plank is 8 m/s towards the left. The frequency of sound detected by detector 'D', before the man jumps off the plank isSpeed of sound is 330 m/s
Answer» The man of mass $50 kg$ is on the platform of mass $150 kg$ moving towards the left making a sound of frequency $f_{0}$ as shown in the figure. The relative speed between the man and the plank is $8 m/s$ towards the left. The frequency of sound detected by detector ' $D$ ', before the man jumps off the plank is Speed of sound is $330 m/s$

Discussion

1624.	The initial velocity of particle is 10 m/s and it's retardation is 2 m/s^2. The distance moved by the particle in 4th second of it's motion is what?
Answer» The initial velocity of particle is 10 m/s and it's retardation is 2 m/s^2. The distance moved by the particle in 4th second of it's motion is what?

Discussion

1625.	A rectangular box, whose base is a square of side 5 cm, stand on a horizontal table and holds water up to 2 cm from the top. When a cube is placed in the water and is completely submerged, the water rises to the top and 14 cube cm of water overflows. Calculate the volume of the cube. Also find its total surface area.
Answer» A rectangular box, whose base is a square of side 5 cm, stand on a horizontal table and holds water up to 2 cm from the top. When a cube is placed in the water and is completely submerged, the water rises to the top and 14 cube cm of water overflows. Calculate the volume of the cube. Also find its total surface area.

Discussion

1626.	A body of volume 100 cm3 weighs 1 kgf in air. Find : (i) its weight in water and (ii) its relative density.
Answer» A body of volume 100 $c m^{3}$ weighs 1 kgf in air. Find : (i) its weight in water and (ii) its relative density.

1626.

A body of volume 100 cm3 weighs 1 kgf in air. Find : (i) its weight in water and (ii) its relative density.

Answer»

A body of volume 100 $c m^{3}$ weighs 1 kgf in air.

Find : (i) its weight in water and (ii) its relative density.

Discussion

1627.	A car decreases its speed from 80kmh to 60kmh in 5 second. The acceleration of the car is:
Answer» A car decreases its speed from $80 \frac{k m}{h}$ to $60 \frac{k m}{h}$ in 5 second. The acceleration of the car is:

Discussion

1628.	Question 32What are decomposers? What will be the consequence of their absence in an ecosystem?
Answer» Question 32 What are decomposers? What will be the consequence of their absence in an ecosystem?

Discussion

1629.	109.Velocity-Displacement Graph for Uniformly accelerated body?
Answer» 109.Velocity-Displacement Graph for Uniformly accelerated body?

Discussion

1630.	the difference of sound level between two points is 30dB . the pressure amplitude between the poiints is
Answer» the difference of sound level between two points is 30dB . the pressure amplitude between the poiints is

Discussion

1631.	a ball is thrown from top if building 45m high with speed 20m/s above horizontal at angle 30 what will be time of fligh
Answer» a ball is thrown from top if building 45m high with speed 20m/s above horizontal at angle 30 what will be time of fligh

Discussion

1632.	Question 2Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.
Answer» Question 2 Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.

Discussion

1633.	The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1500 m s−1. Calculate the wavelength of the disturbance in mm.3
Answer» The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of $1500 {m s}^{- 1}$ . Calculate the wavelength of the disturbance in $mm$ . 3

1633.

The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1500 m s−1. Calculate the wavelength of the disturbance in mm.3

Answer» The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of

1500 {m s}^{- 1}

. Calculate the wavelength of the disturbance in

mm

.

3

Discussion

1634.	what are universal forces ? are all fundamental forces universal forces
Answer» what are universal forces ? are all fundamental forces universal forces

Discussion

1635.	A beam of light converges towards a point O, behind a convex mirror of focal length 20 cm. Find the nature and position of the image, if the point O is 30 cm behind the mirror.
Answer» A beam of light converges towards a point $O$ , behind a convex mirror of focal length $20 cm$ . Find the nature and position of the image, if the point $O$ is $30 cm$ behind the mirror.

Discussion

1636.	Why does sound gets reflected from wall,other than getting absorbed by the wall and keeping the propagation going on
Answer» Why does sound gets reflected from wall,other than getting absorbed by the wall and keeping the propagation going on

Discussion

1637.	Penetrating effect?
Answer» Penetrating effect?

Discussion

1638.	A solid cylinder and a solid sphere of same mass and radius roll without slipping on a rough inclined planeThe force of friction is(1) Same for both the bodies(3) More for sphereY2) More for cylinden(4) Double for sphere than for cylinderh
Answer» A solid cylinder and a solid sphere of same mass and radius roll without slipping on a rough inclined planeThe force of friction is(1) Same for both the bodies(3) More for sphereY2) More for cylinden(4) Double for sphere than for cylinderh

Discussion

1639.	a small ball of mass M is a dis†an ce R / 2 from the centre of a uniform spherical body of mass M .The force exerted on the small ball is (R is the radius of the sphere)
Answer» a small ball of mass M is a dis†an ce R / 2 from the centre of a uniform spherical body of mass M .The force exerted on the small ball is (R is the radius of the sphere)

Discussion

1640.	how mosquito travel with velocity of train when it is inside the train any flying continuously .also law of inertia is not applied for it
Answer» how mosquito travel with velocity of train when it is inside the train any flying continuously .also law of inertia is not applied for it

Discussion

1641.	The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.
Answer» The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.

Discussion

1642.	7The time periods of three sound waves A, B and Care 0.2 ms, 0.2 s and 3 s respectively. The inaudibleSound waves are 1) A and B(2) B and C3) A and C(4) A, B andC10
Answer» 7The time periods of three sound waves A, B and Care 0.2 ms, 0.2 s and 3 s respectively. The inaudibleSound waves are 1) A and B(2) B and C3) A and C(4) A, B andC10

Discussion

1643.	A ball is thrown vertically upward with a speed of 19.6m/s from the top of a tower returns to the earth in 6 secs.Find the height of the tower
Answer» A ball is thrown vertically upward with a speed of 19.6m/s from the top of a tower returns to the earth in 6 secs.Find the height of the tower

Discussion

1644.	In which of the following circuits will the bulb or the bulbs glow the brightest?
Answer» In which of the following circuits will the bulb or the bulbs glow the brightest?

Discussion

1645.	If the distance between four consecutive compressions of a sound wave is 4 cm, then the wavelength of the wave is equal to
Answer» If the distance between four consecutive compressions of a sound wave is 4 cm, then the wavelength of the wave is equal to

Discussion

1646.	Define Pressure? How is thrust different from Pressure?
Answer» Define Pressure? How is thrust different from Pressure?

Discussion

1647.	Does 0,0 lie on y axis other than origin
Answer» Does 0,0 lie on y axis other than origin

Discussion

1648.	a train A runs from east to west amd another train B of the same mass runs from west to east at the same speed along equator . A presses the track with a force F1 amd b presses the track with force F2.then out of F1 amd F2 with is large or weather they are same ?
Answer» a train A runs from east to west amd another train B of the same mass runs from west to east at the same speed along equator . A presses the track with a force F1 amd b presses the track with force F2.then out of F1 amd F2 with is large or weather they are same ?

Discussion

1649.	If four equal masses (each of mass M) initially placed at the vertices of a square of each side L are movingin a circular path circumscribing the square. If the force responsible for their circular motion is only mutualgravitational attraction. Find the speed of each mass.GMGM(1)V L(2)VLV2GM1+L1(3)(4) Zero2/2
Answer» If four equal masses (each of mass M) initially placed at the vertices of a square of each side L are movingin a circular path circumscribing the square. If the force responsible for their circular motion is only mutualgravitational attraction. Find the speed of each mass.GMGM(1)V L(2)VLV2GM1+L1(3)(4) Zero2/2

Discussion

1650.	A body sinks when immersed in kerosene. What relation could be established between the densities of body and kerosene?
Answer» A body sinks when immersed in kerosene. What relation could be established between the densities of body and kerosene?

Discussion

Explore topic-wise InterviewSolutions in .

The path of a free electron in a metal is ___

A ray through the centre of curvature is incident on the spherical mirror makes an angle of _____ with the normal at that point.

An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and the road if the vehicle is to be stopped with a negative acceleration of 1.7 m/s2 ?

Power delivered by the source of the circuit becomes maximum, when

State two properties of the medium on which the speed of sound in it depends.

Write four characteristics of an ideal fuel

A ball is launched from the top of Mt. Everest which is at elevation of 9000 m. The ball moves in circular orbit around earth. Acceleration due to gravity near the earth’s surface is g. The magnitude of the ball’s acceleration while in orbit is

A planet has twice the density of earth but the acceleration due to gravity on its surface is exactly the same as on the surface of earth. Its radius in terms of radius of earth R will be:

Which of the following are properties of a sound wave?

Identify the electrodes in the given diagram of an electric cell:

Efficiency of a cyclic process is 50% and heat interactions are Q1=+1915 J, Q2=−40 J, Q3=+125 J and Q4=−Q J. Find the value of Q.

In the given circuit-Would any of the bulb glow when the switch is in the 'OFF' position?What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?

A TV set picture tube shoots out 6.25×1016 electrons in one second, then find the current flowing in the TV. (Charge of an electron is e=1.6×10−19 C)

What are uses of momentum? Only for 2 marks

Why copper and Aluminium are used to make wires?

What happens when a wet piece of cloth is shakened

A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between the boy and his image will be:

A ball of mass 20 g hits a wall at an angle of 45 degree with a velocity of 15 m/s. If the ball rebounds at 90 degree to the direction of incidence, calculate the impulse received by the ball??

The initial velocity of particle is 10 m/s and it's retardation is 2 m/s^2. The distance moved by the particle in 4th second of it's motion is what?

A body of volume 100 cm3 weighs 1 kgf in air. Find : (i) its weight in water and (ii) its relative density.

A car decreases its speed from 80kmh to 60kmh in 5 second. The acceleration of the car is:

Question 32What are decomposers? What will be the consequence of their absence in an ecosystem?

109.Velocity-Displacement Graph for Uniformly accelerated body?

the difference of sound level between two points is 30dB . the pressure amplitude between the poiints is

a ball is thrown from top if building 45m high with speed 20m/s above horizontal at angle 30 what will be time of fligh

Question 2Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.

The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1500 m s−1. Calculate the wavelength of the disturbance in mm.3

what are universal forces ? are all fundamental forces universal forces

A beam of light converges towards a point O, behind a convex mirror of focal length 20 cm. Find the nature and position of the image, if the point O is 30 cm behind the mirror.

Why does sound gets reflected from wall,other than getting absorbed by the wall and keeping the propagation going on

Penetrating effect?

A solid cylinder and a solid sphere of same mass and radius roll without slipping on a rough inclined planeThe force of friction is(1) Same for both the bodies(3) More for sphereY2) More for cylinden(4) Double for sphere than for cylinderh

a small ball of mass M is a dis†an ce R / 2 from the centre of a uniform spherical body of mass M .The force exerted on the small ball is (R is the radius of the sphere)

how mosquito travel with velocity of train when it is inside the train any flying continuously .also law of inertia is not applied for it

The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.

7The time periods of three sound waves A, B and Care 0.2 ms, 0.2 s and 3 s respectively. The inaudibleSound waves are 1) A and B(2) B and C3) A and C(4) A, B andC10

A ball is thrown vertically upward with a speed of 19.6m/s from the top of a tower returns to the earth in 6 secs.Find the height of the tower

In which of the following circuits will the bulb or the bulbs glow the brightest?

If the distance between four consecutive compressions of a sound wave is 4 cm, then the wavelength of the wave is equal to

Define Pressure? How is thrust different from Pressure?

Does 0,0 lie on y axis other than origin

a train A runs from east to west amd another train B of the same mass runs from west to east at the same speed along equator . A presses the track with a force F1 amd b presses the track with force F2.then out of F1 amd F2 with is large or weather they are same ?

A body sinks when immersed in kerosene. What relation could be established between the densities of body and kerosene?