13232 + Interview Questions in Physics Page 80 InterviewSolution

3951.	a heavy vehivcle moving with velocity 15m/s strikes an object of very samall mas
Answer» a heavy vehivcle moving with velocity 15m/s strikes an object of very samall mas

Discussion

3952.	9. Three identical spheres A, BandC each of radius R, are placed touching one another on a horizontal table. Where is the centre of mass of the system located relative to A (say)?
Answer» 9. Three identical spheres A, BandC each of radius R, are placed touching one another on a horizontal table. Where is the centre of mass of the system located relative to A (say)?

Discussion

3953.	A tennis ball and a cricket ball, both are stationary. To start motion in them (a) a less force is required for the cricket ball than for the tennis ball (b) a less force is required for the tennis ball than for the cricket ball (c) Same force is required for both the ball (d) nothing can be said.
Answer» A tennis ball and a cricket ball, both are stationary. To start motion in them (a) a less force is required for the cricket ball than for the tennis ball (b) a less force is required for the tennis ball than for the cricket ball (c) Same force is required for both the ball (d) nothing can be said.

Discussion

3954.	A ball is thrown from the surface of the moon with a velocity of 19.6 m/s. How much time will it take to attain maximum height? How high will it go?
Answer» A ball is thrown from the surface of the moon with a velocity of 19.6 m/s. How much time will it take to attain maximum height? How high will it go?

Discussion

3955.	'Force can't change momentum along a direction normal to it i.e. component of velocity normal to force doesn't change.'What does this mean?
Answer» 'Force can't change momentum along a direction normal to it i.e. component of velocity normal to force doesn't change.' What does this mean?

Discussion

3956.	The resolution of an n-bit ADC with maximum input voltage of 5 V is 5 m V. Then the value of n is ____.10
Answer» The resolution of an n-bit ADC with maximum input voltage of 5 V is 5 m V. Then the value of n is ____. 10

Discussion

3957.	23.Why the pressure inside a capillary tube is Patm-2sigma/r
Answer» 23.Why the pressure inside a capillary tube is Patm-2sigma/r

Discussion

3958.	If a ball is thrown vertically upwards from the ground with some initial velocity 'u' , and the body attains some height with time 't' . Will the ball take the same time 't' to touch the ground though the acceleration due to gravity is always downwards? Give reason for your answer.
Answer» If a ball is thrown vertically upwards from the ground with some initial velocity 'u' , and the body attains some height with time 't' . Will the ball take the same time 't' to touch the ground though the acceleration due to gravity is always downwards? Give reason for your answer.

Discussion

3959.	what is lens maker formula
Answer» what is lens maker formula

Discussion

3960.	A particle is thrown from a tower height 40m with initial velocity 20√2 m/s making an angle of 45 degree with horizontal as shown in figure. The time at which the particle will strike the ground will be nearest to
Answer» A particle is thrown from a tower height 40m with initial velocity $20 \sqrt{2}$ m/s making an angle of 45 degree with horizontal as shown in figure. The time at which the particle will strike the ground will be nearest to

3960.

A particle is thrown from a tower height 40m with initial velocity 20√2 m/s making an angle of 45 degree with horizontal as shown in figure. The time at which the particle will strike the ground will be nearest to

Answer»

A particle is thrown from a tower height 40m with initial velocity $20 \sqrt{2}$ m/s making an angle of 45 degree with horizontal as shown in figure. The time at which the particle will strike the ground will be nearest to

Discussion

3961.	Newton's laws of motion are applicable to which frame?
Answer» Newton's laws of motion are applicable to which frame?

Discussion

3962.	{ If percentage error in the measurement of mass is }20% and in velocity is }15%, then }} percentage error in the momentum will be
Answer» { If percentage error in the measurement of mass is }20% and in velocity is }15%, then }} percentage error in the momentum will be

Discussion

3963.	Consider the circuit shown in the figure below:In the circuit the maximum power rating of the zener diode is equal to 400 mW, the maximum possible value of RL is equal to ________ kΩ 1
Answer» Consider the circuit shown in the figure below: In the circuit the maximum power rating of the zener diode is equal to 400 mW, the maximum possible value of $R_{L}$ is equal to ________ $k Ω$ 1

Discussion

3964.	With reference to the figure,showing a light inextensible string passing over a fixed frictionless pulley find the tension T3. Options 1. 24.5N 2.29.4N 3.18.6N 4. 68.6N
Answer» With reference to the figure,showing a light inextensible string passing over a fixed frictionless pulley find the tension T3. Options 1. 24.5N 2.29.4N 3.18.6N 4. 68.6N

Discussion

3965.	ratio of magnitude of distance and didplacement is:
Answer» ratio of magnitude of distance and didplacement is:

Discussion

3966.	Why does it hurt our eye when we look at the sun?
Answer» Why does it hurt our eye when we look at the sun?

Discussion

3967.	Explain what is conservation of momentum.
Answer» Explain what is conservation of momentum.

Discussion

3968.	Area under a v - t graph represents a physical quantity which has the unit:
Answer» Area under a v - t graph represents a physical quantity which has the unit:

Discussion

3969.	The radius of curvature of a convex mirror is 60 cm. When an object is placed at B its image is formed at B′. If size of the image is half that of the object then the distance between B and B′ is
Answer» The radius of curvature of a convex mirror is $60 cm$ . When an object is placed at $B$ its image is formed at $B^{'}$ . If size of the image is half that of the object then the distance between $B$ and $B^{'}$ is

Discussion

3970.	At sea level, the atmospheric pressure is 1.04 ×105Pa. Assuming g = 10 ms−2 and density of air to be uniform and equal to 1.3 kg m−3, find the height of the atmosphere.
Answer» At sea level, the atmospheric pressure is 1.04 $\times 10^{5} P a$ . Assuming g = 10 $m s^{- 2}$ and density of air to be uniform and equal to 1.3 kg $m^{- 3}$ , find the height of the atmosphere.

Discussion

3971.	A truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. Which vehicle experiences the greater change in momentum?
Answer» A truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. Which vehicle experiences the greater change in momentum?

Discussion

3972.	A man exerts a force of 200 N in pulling a cart at a constant speed of 5 m/s. The power spent by man is
Answer» A man exerts a force of 200 N in pulling a cart at a constant speed of 5 m/s. The power spent by man is

Discussion

3973.	A wall is made up of two layers A and B. The thickness of the two layers is the same, but materials are different. The thermal conductivity of A is double than that of B. In thermal equilibrium the temperature difference between the two ends of wall is 36o C. Then the difference of temperature at the two surfaces of A will be
Answer» A wall is made up of two layers A and B. The thickness of the two layers is the same, but materials are different. The thermal conductivity of A is double than that of B. In thermal equilibrium the temperature difference between the two ends of wall is $36^{o} C$ . Then the difference of temperature at the two surfaces of A will be

Discussion

3974.	An ideal gas is taken through four steps . The amount of heat involved in these steps are Q1= 5960J , Q2= -5585J ,Q3= 2980J ,and Q4= 3645J respectively .The corresponding work involved are W1= 2200J , W2 = -825J, W3= -1100 J and W4 respectively . what is the effficiency of the cycle 1. 10.82% 2. 11.42% 3. 9.32% 4. 5.8
Answer» An ideal gas is taken through four steps . The amount of heat involved in these steps are Q1= 5960J , Q2= -5585J ,Q3= 2980J ,and Q4= 3645J respectively .The corresponding work involved are W1= 2200J , W2 = -825J, W3= -1100 J and W4 respectively . what is the effficiency of the cycle 1. 10.82% 2. 11.42% 3. 9.32% 4. 5.8

Discussion

3975.	28. A car, starting from rest, accelerates at the rate 'a'through a distance S, then continues at constantspeed for time t, and then decelerates at the rate(a/2) to come to rest. If the total distance travelledis 15 S, then,1(1) S =at21(2) S=at241(3) S=at2(4) S =at2672
Answer» 28. A car, starting from rest, accelerates at the rate 'a'through a distance S, then continues at constantspeed for time t, and then decelerates at the rate(a/2) to come to rest. If the total distance travelledis 15 S, then,1(1) S =at21(2) S=at241(3) S=at2(4) S =at2672

Discussion

3976.	Find the equivalent resistance in the following circuit.
Answer» Find the equivalent resistance in the following circuit.

Discussion

3977.	Derive the equation for displacement-time relation. Graphically.
Answer» Derive the equation for displacement-time relation. Graphically.

Discussion

3978.	Explain meaning of the terms compression and rarefaction in relation to a longitudnal wave.
Answer» Explain meaning of the terms compression and rarefaction in relation to a longitudnal wave.

Discussion

3979.	How is stability of stars maintained?
Answer» How is stability of stars maintained?

Discussion

3980.	A) If velocity of a body changes regularly from u to v in time t, what is the average velocity of that body?B) Why is the foot of a man injured when he hits a stone?
Answer» A) If velocity of a body changes regularly from u to v in time t, what is the average velocity of that body? B) Why is the foot of a man injured when he hits a stone?

Discussion

3981.	What will be the formula of power of mirror in any general medium. Will it contain the refractive index init.
Answer» What will be the formula of power of mirror in any general medium. Will it contain the refractive index init.

Discussion

3982.	Which of the following is NOT a property of magnet?
Answer» Which of the following is NOT a property of magnet?

Discussion

3983.	Draw a diagram to show the forces acting on a body floating in water with its some part submerged. Name the forces and show their points of application. How is the weight of water displaced by the floating body related to the weight of the body itself ?
Answer» Draw a diagram to show the forces acting on a body floating in water with its some part submerged. Name the forces and show their points of application. How is the weight of water displaced by the floating body related to the weight of the body itself ?

Discussion

3984.	an objet is placed 30cm in front of a plano convex lens with its spherical surface of radius of curvature 20cm if the refractive index of the material of the lense is 1.5 find position and nature of image formed
Answer» an objet is placed 30cm in front of a plano convex lens with its spherical surface of radius of curvature 20cm if the refractive index of the material of the lense is 1.5 find position and nature of image formed

Discussion

3985.	Write short notes on:(1) Applications of Archimedes’ principle.(2) Buoyant force.
Answer» Write short notes on: (1) Applications of Archimedes’ principle. (2) Buoyant force.

3985.

Write short notes on:(1) Applications of Archimedes’ principle.(2) Buoyant force.

Answer»

Write short notes on:

(1) Applications of Archimedes’ principle.

(2) Buoyant force.

Discussion

3986.	what is the electric field at a point kept perpendicular to the centre of rod of length L.Dis†an ce of point from rod is
Answer» what is the electric field at a point kept perpendicular to the centre of rod of length L.Dis†an ce of point from rod is

Discussion

3987.	Motion and rest are relative to each other. Explain with an example.
Answer» Motion and rest are relative to each other. Explain with an example.

Discussion

3988.	Please give me the notes of this chapter
Answer» Please give me the notes of this chapter

3988.

Please give me the notes of this chapter

Answer»

Please give me the notes of this chapter

Discussion

3989.	What is the SI unit of force
Answer» What is the SI unit of force

Discussion

3990.	In an astronomical telescope in normal adjustment a straight black line of length L is drawn on insidepart of objective lens.The eyepiece forms a real image of this line.The length of this image is l. The magnification of telescope is
Answer» In an astronomical telescope in normal adjustment a straight black line of length L is drawn on insidepart of objective lens.The eyepiece forms a real image of this line.The length of this image is l. The magnification of telescope is

Discussion

3991.	A uniform wire of length L and Mass Mis stretched between two fixed points, keeping a tension F. A sound of frequency mu is impressed on it. Then the maximum vibrational energy is existing in the wire when mu = 2. The reference index of glass is found to have the values 1.49, 1.50, 1.52 and 1.48. Percentage error in the measurement is
Answer» A uniform wire of length L and Mass Mis stretched between two fixed points, keeping a tension F. A sound of frequency mu is impressed on it. Then the maximum vibrational energy is existing in the wire when mu = 2. The reference index of glass is found to have the values 1.49, 1.50, 1.52 and 1.48. Percentage error in the measurement is

Discussion

3992.	Give one example each of a real and a virtual image.
Answer» Give one example each of a real and a virtual image.

Discussion

3993.	If masses of two object are tripled and dis†an ce between tgem is doubled then gravitational force of attraction between them will increase or decrease by what percentage
Answer» If masses of two object are tripled and dis†an ce between tgem is doubled then gravitational force of attraction between them will increase or decrease by what percentage

Discussion

3994.	A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observes the motion of the shell asa parabola ,whose horizontal range is
Answer» A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observes the motion of the shell asa parabola ,whose horizontal range is

Discussion

3995.	what are MKS, CGS, SI units of pressure what are their their conversions
Answer» what are MKS, CGS, SI units of pressure what are their their conversions

Discussion

3996.	Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.
Answer» Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.

Discussion

3997.	For uniform motion : (a) the distance-graph is a straight line parallel to the time axis. (b) the speed-time graph is a straight line inclined to the time axis. (c) the speed-time graph is a straight line parallel to the time axis. (d) the acceleration-time graph is a straight line parallel to the time axis.
Answer» For uniform motion : (a) the distance-graph is a straight line parallel to the time axis. (b) the speed-time graph is a straight line inclined to the time axis. (c) the speed-time graph is a straight line parallel to the time axis. (d) the acceleration-time graph is a straight line parallel to the time axis.

3997.

For uniform motion : (a) the distance-graph is a straight line parallel to the time axis. (b) the speed-time graph is a straight line inclined to the time axis. (c) the speed-time graph is a straight line parallel to the time axis. (d) the acceleration-time graph is a straight line parallel to the time axis.

Answer»

For uniform motion :

(a) the distance-graph is a straight line parallel to the time axis.

(b) the speed-time graph is a straight line inclined to the time axis.

(c) the speed-time graph is a straight line parallel to the time axis.

(d) the acceleration-time graph is a straight line parallel to the time axis.

Discussion

3998.	5. A square plate of side 'a' has been removed from auniform big metal square plate having mass M andside 2a, as shown in figure. The moment of inertia ofremaining part about its centre of mass and the givenaxis is (M mass of original plate)15Ma2(1) 245Ma2(2) 242aMa1817Ma2(4) 24
Answer» 5. A square plate of side 'a' has been removed from auniform big metal square plate having mass M andside 2a, as shown in figure. The moment of inertia ofremaining part about its centre of mass and the givenaxis is (M mass of original plate)15Ma2(1) 245Ma2(2) 242aMa1817Ma2(4) 24

Discussion

3999.	A biker reduces the speed from 72 kmhr−1 to 36 kmhr−1 in 6 s. Calculate the acceleration in this case.
Answer» A biker reduces the speed from $72 k m h r^{- 1}$ to $36 k m h r^{- 1}$ in $6 s$ . Calculate the acceleration in this case.

Discussion

4000.	Two cars having masses in the ratio 4:5, accelerate in the ratio 2:3. Find the ratio of forces exerted by each of them.
Answer» Two cars having masses in the ratio 4:5, accelerate in the ratio 2:3. Find the ratio of forces exerted by each of them.

Discussion

Explore topic-wise InterviewSolutions in .

a heavy vehivcle moving with velocity 15m/s strikes an object of very samall mas

9. Three identical spheres A, BandC each of radius R, are placed touching one another on a horizontal table. Where is the centre of mass of the system located relative to A (say)?

A tennis ball and a cricket ball, both are stationary. To start motion in them (a) a less force is required for the cricket ball than for the tennis ball (b) a less force is required for the tennis ball than for the cricket ball (c) Same force is required for both the ball (d) nothing can be said.

A ball is thrown from the surface of the moon with a velocity of 19.6 m/s. How much time will it take to attain maximum height? How high will it go?

'Force can't change momentum along a direction normal to it i.e. component of velocity normal to force doesn't change.'What does this mean?

The resolution of an n-bit ADC with maximum input voltage of 5 V is 5 m V. Then the value of n is ____.10

23.Why the pressure inside a capillary tube is Patm-2sigma/r

If a ball is thrown vertically upwards from the ground with some initial velocity 'u' , and the body attains some height with time 't' . Will the ball take the same time 't' to touch the ground though the acceleration due to gravity is always downwards? Give reason for your answer.

what is lens maker formula

A particle is thrown from a tower height 40m with initial velocity 20√2 m/s making an angle of 45 degree with horizontal as shown in figure. The time at which the particle will strike the ground will be nearest to

Newton's laws of motion are applicable to which frame?

{ If percentage error in the measurement of mass is }20% and in velocity is }15%, then }} percentage error in the momentum will be

Consider the circuit shown in the figure below:In the circuit the maximum power rating of the zener diode is equal to 400 mW, the maximum possible value of RL is equal to ________ kΩ 1

With reference to the figure,showing a light inextensible string passing over a fixed frictionless pulley find the tension T3. Options 1. 24.5N 2.29.4N 3.18.6N 4. 68.6N

ratio of magnitude of distance and didplacement is:

Why does it hurt our eye when we look at the sun?

Explain what is conservation of momentum.

Area under a v - t graph represents a physical quantity which has the unit:

The radius of curvature of a convex mirror is 60 cm. When an object is placed at B its image is formed at B′. If size of the image is half that of the object then the distance between B and B′ is

At sea level, the atmospheric pressure is 1.04 ×105Pa. Assuming g = 10 ms−2 and density of air to be uniform and equal to 1.3 kg m−3, find the height of the atmosphere.

A truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. Which vehicle experiences the greater change in momentum?

A man exerts a force of 200 N in pulling a cart at a constant speed of 5 m/s. The power spent by man is

28. A car, starting from rest, accelerates at the rate 'a'through a distance S, then continues at constantspeed for time t, and then decelerates at the rate(a/2) to come to rest. If the total distance travelledis 15 S, then,1(1) S =at21(2) S=at241(3) S=at2(4) S =at2672

Find the equivalent resistance in the following circuit.

Derive the equation for displacement-time relation. Graphically.

Explain meaning of the terms compression and rarefaction in relation to a longitudnal wave.

How is stability of stars maintained?

A) If velocity of a body changes regularly from u to v in time t, what is the average velocity of that body?B) Why is the foot of a man injured when he hits a stone?

What will be the formula of power of mirror in any general medium. Will it contain the refractive index init.

Which of the following is NOT a property of magnet?

Draw a diagram to show the forces acting on a body floating in water with its some part submerged. Name the forces and show their points of application. How is the weight of water displaced by the floating body related to the weight of the body itself ?

an objet is placed 30cm in front of a plano convex lens with its spherical surface of radius of curvature 20cm if the refractive index of the material of the lense is 1.5 find position and nature of image formed

Write short notes on:(1) Applications of Archimedes’ principle.(2) Buoyant force.

what is the electric field at a point kept perpendicular to the centre of rod of length L.Dis†an ce of point from rod is

Motion and rest are relative to each other. Explain with an example.

Please give me the notes of this chapter

What is the SI unit of force

In an astronomical telescope in normal adjustment a straight black line of length L is drawn on insidepart of objective lens.The eyepiece forms a real image of this line.The length of this image is l. The magnification of telescope is

Give one example each of a real and a virtual image.

If masses of two object are tripled and dis†an ce between tgem is doubled then gravitational force of attraction between them will increase or decrease by what percentage

A shell is fired vertically upwards with a velocity v1 from a trolley moving horizontally with velocity v2. A person on the ground observes the motion of the shell asa parabola ,whose horizontal range is

what are MKS, CGS, SI units of pressure what are their their conversions

Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.

5. A square plate of side 'a' has been removed from auniform big metal square plate having mass M andside 2a, as shown in figure. The moment of inertia ofremaining part about its centre of mass and the givenaxis is (M mass of original plate)15Ma2(1) 245Ma2(2) 242aMa1817Ma2(4) 24

A biker reduces the speed from 72 kmhr−1 to 36 kmhr−1 in 6 s. Calculate the acceleration in this case.

Two cars having masses in the ratio 4:5, accelerate in the ratio 2:3. Find the ratio of forces exerted by each of them.