13232 + Interview Questions in Physics Page 179 InterviewSolution

8901.	Under what condition the distance covered by an object equals to its displacement.
Answer» Under what condition the distance covered by an object equals to its displacement.

Discussion

8902.	Work done by a person on a book held in his hand while walking with uniform speed on a horizontal road. Here the work done is Negative, positive or zero?
Answer» Work done by a person on a book held in his hand while walking with uniform speed on a horizontal road. Here the work done is Negative, positive or zero?

Discussion

8903.	define uniform and non-uniform speeds.
Answer» define uniform and non-uniform speeds.

Discussion

8904.	What is the refraction of light?
Answer» What is the refraction of light?

Discussion

8905.	In the given figure the atmospheric pressure is equal to ρgh. Which of the following is not always correct when the simple barometer is accurately measuring the atmospheric pressure?
Answer» In the given figure the atmospheric pressure is equal to ρgh. Which of the following is not always correct when the simple barometer is accurately measuring the atmospheric pressure?

8905.

In the given figure the atmospheric pressure is equal to ρgh. Which of the following is not always correct when the simple barometer is accurately measuring the atmospheric pressure?

Answer»

In the given figure the atmospheric pressure is equal to ρgh. Which of the following is not always correct when the simple barometer is accurately measuring the atmospheric pressure?

Discussion

8906.	A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 division below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31st division on the circular scale coincides with the reference line. The diameter of the lead shot is:
Answer» A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 division below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31^st division on the circular scale coincides with the reference line. The diameter of the lead shot is:

8906.

A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 division below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31st division on the circular scale coincides with the reference line. The diameter of the lead shot is:

Answer»

A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 division below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31^st division on the circular scale coincides with the reference line. The diameter of the lead shot is:

Discussion

8907.	Pressure due an object on the ground is least at
Answer» Pressure due an object on the ground is least at

Discussion

8908.	Match the following: ObjectsEnergy Conversions1) Bicyclea) Sun′s energy to electrical energy2) Engineb) Muscular energy to mechanical energy3) Wind turbinec) Heat energy to mechanical energy4) Solar paneld) Wind energy to electrical energy
Answer» Match the following: $\begin{matrix} O b j e c t s & E n e r g y C o n v e r s i o n s 1) B i c y c l e & a) S u n^{'} s e n e r g y t o e l e c t r i c a l e n e r g y 2) E n g i n e & b) M u s c u l a r e n e r g y t o m e c h a n i c a l e n e r g y 3) W i n d t u r b i n e & c) H e a t e n e r g y t o m e c h a n i c a l e n e r g y 4) S o l a r p a n e l & d) W i n d e n e r g y t o e l e c t r i c a l e n e r g y \end{matrix}$

Discussion

8909.	A body of volume V and density ρ is completely immersed in a liquid of density ρL . If g is the acceleration due to gravity, which of the following expressions are correct : 1) weight of the body = Vρg 2) upthrust on the body = VρLg 3) apparent weight of the body in liquid = VρLg 4) the loss in weight of the body = V(ρ-ρL)g
Answer» A body of volume V and density ρ is completely immersed in a liquid of density ρ_L . If g is the acceleration due to gravity, which of the following expressions are correct : 1) weight of the body = Vρg 2) upthrust on the body = VρLg 3) apparent weight of the body in liquid = VρLg 4) the loss in weight of the body = V(ρ-ρL)g

8909.

A body of volume V and density ρ is completely immersed in a liquid of density ρL . If g is the acceleration due to gravity, which of the following expressions are correct : 1) weight of the body = Vρg 2) upthrust on the body = VρLg 3) apparent weight of the body in liquid = VρLg 4) the loss in weight of the body = V(ρ-ρL)g

Answer»

A body of volume V and density ρ is completely immersed in a liquid of density ρ_L . If g is the acceleration due to gravity, which of the following expressions are correct :

1) weight of the body = Vρg

2) upthrust on the body = VρLg

3) apparent weight of the body in liquid = VρLg

4) the loss in weight of the body = V(ρ-ρL)g

Discussion

8910.	A train moving with a velocity of 20 m s-¹ is brought to rest by applying brakes in 5s. Calculate the retardation.
Answer» A train moving with a velocity of 20 m s-¹ is brought to rest by applying brakes in 5s. Calculate the retardation.

Discussion

8911.	Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
Answer» Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.

Discussion

8912.	A lead bullet of mass 2 Kg, traveling with a velocity of 20 ms−1, comes to rest after penetrating 20m in a still target. Find the resistive force applied by the target and acceleration of the bullet.
Answer» A lead bullet of mass 2 Kg, traveling with a velocity of 20 $m s^{- 1}$ , comes to rest after penetrating 20m in a still target. Find the resistive force applied by the target and acceleration of the bullet.

Discussion

8913.	The gravitational force (F) between two bodies with masses M and m separated by a distance (d) is given by:
Answer» The gravitational force $(F)$ between two bodies with masses $M$ and $m$ separated by a distance $(d)$ is given by:

Discussion

8914.	When 92U235 undergoes fission, 0.1% of its original mass is changed into energy. 9×10xJ of energy is released if 1 kg of 92U235 undergoes fission, then the value of x = ___
Answer» When $_{92} U^{235}$ undergoes fission, 0.1% of its original mass is changed into energy. $9 \times 10^{x} J$ of energy is released if $1 k g$ of $_{92} U^{235}$ undergoes fission, then the value of $x$ = ___

Discussion

8915.	When an object undergoes acceleration
Answer» When an object undergoes acceleration

Discussion

8916.	When an object falls freely towards the earth, then its total energy : (a) increases (b) decreases (c) remains constant (d) first increases and then decreases
Answer» When an object falls freely towards the earth, then its total energy : (a) increases (b) decreases (c) remains constant (d) first increases and then decreases

8916.

When an object falls freely towards the earth, then its total energy : (a) increases (b) decreases (c) remains constant (d) first increases and then decreases

Answer»

When an object falls freely towards the earth, then its total energy :

(a) increases

(b) decreases

(c) remains constant

(d) first increases and then decreases

Discussion

8917.	To what height should an object of mass 2 kg be raised so that its potential energy is 980 J?
Answer» To what height should an object of mass $2 kg$ be raised so that its potential energy is $980 J$ ?

Discussion

8918.	The winners of long jump each weighing 56 Kg, 40 Kg and 45 Kg stand on the podium. What is the work done by them on the podium while they receive the medals?
Answer» The winners of long jump each weighing 56 Kg, 40 Kg and 45 Kg stand on the podium. What is the work done by them on the podium while they receive the medals?

Discussion

8919.	To move a table with a constant velocity, a force of 300 N is required. What is the friction force that will be exerted on the table ? (Please specify the answer in N)
Answer» To move a table with a constant velocity, a force of 300 N is required. What is the friction force that will be exerted on the table ? (Please specify the answer in N)

Discussion

8920.	A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you thing is changing in this case ? (a) magnitude of acceleration being produced (b) distance covered by the sprinter per second (c) direction in which the sprinter is running (d) centripetal force acting on the sprinter
Answer» A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you thing is changing in this case ? (a) magnitude of acceleration being produced (b) distance covered by the sprinter per second (c) direction in which the sprinter is running (d) centripetal force acting on the sprinter

8920.

A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you thing is changing in this case ? (a) magnitude of acceleration being produced (b) distance covered by the sprinter per second (c) direction in which the sprinter is running (d) centripetal force acting on the sprinter

Answer»

A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you thing is changing in this case ?

(a) magnitude of acceleration being produced

(b) distance covered by the sprinter per second

(c) direction in which the sprinter is running

(d) centripetal force acting on the sprinter

Discussion

8921.	What heats up faster air, water or land?Why?
Answer» What heats up faster air, water or land?Why?

Discussion

8922.	Which of the following statement(s) about motion is/are true?
Answer» Which of the following statement(s) about motion is/are true?

Discussion

8923.	What is the unit of the Velocity Ratio(V.R)?
Answer» What is the unit of the Velocity Ratio(V.R)?

Discussion

8924.	If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be : (a) 2 (b) 0.2 (c) 20 (d) 200
Answer» If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then $λ$ for this wave in cm will be : (a) 2 (b) 0.2 (c) 20 (d) 200

8924.

If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be : (a) 2 (b) 0.2 (c) 20 (d) 200

Answer»

If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then $λ$ for this wave in cm will be :

(a) 2

(b) 0.2

(c) 20

(d) 200

Discussion

8925.	Consider iron and water. In which of the given media does sound travel faster? __
Answer» Consider iron and water. In which of the given media does sound travel faster? __

Discussion

8926.	When a paper is put in a bucket of water, it floats. This is because density of paper is less than the density of water. However, if it is forced to the bottom, it does not return to the top. If the paper has less density, shouldn't it just float back to the top? Does this mean the paper is just floating because of surface tension and it has nothing to do with density and buoyancy?
Answer» When a paper is put in a bucket of water, it floats. This is because density of paper is less than the density of water. However, if it is forced to the bottom, it does not return to the top. If the paper has less density, shouldn't it just float back to the top? Does this mean the paper is just floating because of surface tension and it has nothing to do with density and buoyancy?

Discussion

8927.	Brakes are applied to a car so as to produce retardation of 5m/s². If the car takes 1.5 s to stop after applying the brakes calculate the distance travelled by it?
Answer» Brakes are applied to a car so as to produce retardation of 5m/s². If the car takes 1.5 s to stop after applying the brakes calculate the distance travelled by it?

Discussion

8928.	How can the least count of a screw guage be decreased ?
Answer» How can the least count of a screw guage be decreased ?

Discussion

8929.	Two spheres of mass m and M of the same radius R are separated by a distance √8R as shown in the figure. The force of attraction between them is:
Answer» Two spheres of mass $m$ and $M$ of the same radius $R$ are separated by a distance $\sqrt{8} R$ as shown in the figure. The force of attraction between them is:

Discussion

8930.	A ball thrown up vertically returns to the thrower after 6 s. The velocity with which it was thrown up is (Take g=9.8 ms−2)
Answer» A ball thrown up vertically returns to the thrower after 6 s. The velocity with which it was thrown up is (Take $g = 9.8 m s^{- 2}$ )

Discussion

8931.	A cyclist follows the path from A to E as shown in the given diagram. Calculate the distance and displacement in this case. Given scale as 1 unit=2 kilometre.
Answer» A cyclist follows the path from A to E as shown in the given diagram. Calculate the distance and displacement in this case. Given scale as $1 u n i t = 2 k i l o m e t r e .$

Discussion

8932.	What is the direction of the magnetic field at the centre of a current-carrying loop if the current is in the clockwise direction?
Answer» What is the direction of the magnetic field at the centre of a current-carrying loop if the current is in the clockwise direction?

Discussion

8933.	Power is measure of the...... 1. The rapidity with which work done2. Amount of energy required to perform the work. 2. The slowness with which work is performed 5. Length of time
Answer» Power is measure of the...... 1. The rapidity with which work done2. Amount of energy required to perform the work. 2. The slowness with which work is performed 5. Length of time

8933.

Power is measure of the...... 1. The rapidity with which work done2. Amount of energy required to perform the work. 2. The slowness with which work is performed 5. Length of time

Answer»

Power is measure of the......

1. The rapidity with which work done2. Amount of energy required to perform the work. 2. The slowness with which work is performed 5. Length of time

Discussion

8934.	Current in circuit flows from:
Answer» Current in circuit flows from:

Discussion

8935.	A piece of weighs 44.5gf in air. If the density of iron is 8.9*10^3kg/m^3,find weight of iron piece when immersed in water.
Answer» A piece of weighs 44.5gf in air. If the density of iron is 8.9*10^3kg/m^3,find weight of iron piece when immersed in water.

Discussion

8936.	A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.
Answer» A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.

Discussion

8937.	What do you mean by zero work, positive work and negative work?
Answer» What do you mean by zero work, positive work and negative work?

Discussion

8938.	A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the position of the ball in T/3 second?
Answer» A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the position of the ball in T/3 second?

Discussion

8939.	The intensity of sound from a point source is 1.0 × 10−6m−2 at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source?
Answer» The intensity of sound from a point source is $1.0 \times 10^{- 6} m^{- 2}$ at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source?

Discussion

8940.	What is the difference between force and thrust?
Answer» What is the difference between force and thrust?

Discussion

8941.	1 Newton is equal to
Answer» 1 Newton is equal to

Discussion

8942.	Explain the statement “Wave transfer energy and not matter".
Answer» Explain the statement “Wave transfer energy and not matter".

Discussion

8943.	A monkey hangs on a rope. The rope goes up over a pulley, and on the other end is an equal weight of block filled with bananas. Now the monkey starts climbing up the rope. What can be the possible cases as observed by a boy on the ground?
Answer» A monkey hangs on a rope. The rope goes up over a pulley, and on the other end is an equal weight of block filled with bananas. Now the monkey starts climbing up the rope. What can be the possible cases as observed by a boy on the ground?

8943.

A monkey hangs on a rope. The rope goes up over a pulley, and on the other end is an equal weight of block filled with bananas. Now the monkey starts climbing up the rope. What can be the possible cases as observed by a boy on the ground?

Answer»

A monkey hangs on a rope. The rope goes up over a pulley, and on the other end is an equal weight of block filled with bananas. Now the monkey starts climbing up the rope. What can be the possible cases as observed by a boy on the ground?

Discussion

8944.	Which object is vibrating when the following sounds are produced ? (i) The sound of a sitar (ii) The sound of a tabla (iii) The sound of a tuning fork (iv) The buzzing of a bee or mosquito (v) The sound of a flute
Answer» Which object is vibrating when the following sounds are produced ? (i) The sound of a sitar (ii) The sound of a tabla (iii) The sound of a tuning fork (iv) The buzzing of a bee or mosquito (v) The sound of a flute

8944.

Which object is vibrating when the following sounds are produced ? (i) The sound of a sitar (ii) The sound of a tabla (iii) The sound of a tuning fork (iv) The buzzing of a bee or mosquito (v) The sound of a flute

Answer»

Which object is vibrating when the following sounds are produced ?

(i) The sound of a sitar

(ii) The sound of a tabla

(iii) The sound of a tuning fork

(iv) The buzzing of a bee or mosquito

(v) The sound of a flute

Discussion

8945.	Name two sound absorbing materials (or objects) which can make our big room less echoey.
Answer» Name two sound absorbing materials (or objects) which can make our big room less echoey.

Discussion

8946.	Which wave property determines loudness?
Answer» Which wave property determines loudness?

Discussion

8947.	A bucket filled with water is lowered from terrace to the ground floor with the help of rope. Is the work done by the gravitational force is positive or negative?
Answer» A bucket filled with water is lowered from terrace to the ground floor with the help of rope. Is the work done by the gravitational force is positive or negative?

Discussion

8948.	A bicycle initially moving with a velocity 5.0 m s−1 accelerates for 5 s at a rate of 2 m s−2. What will be its final velocity?
Answer» A bicycle initially moving with a velocity 5.0 m $s^{- 1}$ accelerates for 5 s at a rate of 2 m $s^{- 2}$ . What will be its final velocity?

Discussion

8949.	Draw a simple diagram of a hydraulic jack and explain its working.
Answer» Draw a simple diagram of a hydraulic jack and explain its working.

Discussion

8950.	Question 5 An object is put one by one in three liquids having different densities. The object floats with 19, 211 and 37 parts of their volumes outside the liquidsurface in liquids of densities d1, d2 and d3 respectively. Which of the following statement is correct? (a) d1 > d2 > d3 (b) d1 > d2 < d3 (c) d1 < d2 > d3 (d) d1 < d2 < d3
Answer» Question 5 An object is put one by one in three liquids having different densities. The object floats with $\frac{1}{9}$ , $\frac{2}{11}$ and $\frac{3}{7}$ parts of their volumes outside the liquidsurface in liquids of densities $d_{1}$ , $d_{2}$ and $d_{3}$ respectively. Which of the following statement is correct? (a) $d_{1}$ > $d_{2}$ > $d_{3}$ (b) $d_{1}$ > $d_{2}$ < $d_{3}$ (c) $d_{1}$ < $d_{2}$ > $d_{3}$ (d) $d_{1}$ < $d_{2}$ < $d_{3}$

Discussion

Explore topic-wise InterviewSolutions in .

Under what condition the distance covered by an object equals to its displacement.

Work done by a person on a book held in his hand while walking with uniform speed on a horizontal road. Here the work done is Negative, positive or zero?

define uniform and non-uniform speeds.

What is the refraction of light?

In the given figure the atmospheric pressure is equal to ρgh. Which of the following is not always correct when the simple barometer is accurately measuring the atmospheric pressure?

Pressure due an object on the ground is least at

Match the following: ObjectsEnergy Conversions1) Bicyclea) Sun′s energy to electrical energy2) Engineb) Muscular energy to mechanical energy3) Wind turbinec) Heat energy to mechanical energy4) Solar paneld) Wind energy to electrical energy

A train moving with a velocity of 20 m s-¹ is brought to rest by applying brakes in 5s. Calculate the retardation.

Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.

A lead bullet of mass 2 Kg, traveling with a velocity of 20 ms−1, comes to rest after penetrating 20m in a still target. Find the resistive force applied by the target and acceleration of the bullet.

The gravitational force (F) between two bodies with masses M and m separated by a distance (d) is given by:

When 92U235 undergoes fission, 0.1% of its original mass is changed into energy. 9×10xJ of energy is released if 1 kg of 92U235 undergoes fission, then the value of x = ___

When an object undergoes acceleration

When an object falls freely towards the earth, then its total energy : (a) increases (b) decreases (c) remains constant (d) first increases and then decreases

To what height should an object of mass 2 kg be raised so that its potential energy is 980 J?

The winners of long jump each weighing 56 Kg, 40 Kg and 45 Kg stand on the podium. What is the work done by them on the podium while they receive the medals?

To move a table with a constant velocity, a force of 300 N is required. What is the friction force that will be exerted on the table ? (Please specify the answer in N)

What heats up faster air, water or land?Why?

Which of the following statement(s) about motion is/are true?

What is the unit of the Velocity Ratio(V.R)?

If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be : (a) 2 (b) 0.2 (c) 20 (d) 200

Consider iron and water. In which of the given media does sound travel faster? __

Brakes are applied to a car so as to produce retardation of 5m/s². If the car takes 1.5 s to stop after applying the brakes calculate the distance travelled by it?

How can the least count of a screw guage be decreased ?

Two spheres of mass m and M of the same radius R are separated by a distance √8R as shown in the figure. The force of attraction between them is:

A ball thrown up vertically returns to the thrower after 6 s. The velocity with which it was thrown up is (Take g=9.8 ms−2)

A cyclist follows the path from A to E as shown in the given diagram. Calculate the distance and displacement in this case. Given scale as 1 unit=2 kilometre.

What is the direction of the magnetic field at the centre of a current-carrying loop if the current is in the clockwise direction?

Power is measure of the...... 1. The rapidity with which work done2. Amount of energy required to perform the work. 2. The slowness with which work is performed 5. Length of time

Current in circuit flows from:

A piece of weighs 44.5gf in air. If the density of iron is 8.9*10^3kg/m^3,find weight of iron piece when immersed in water.

A bus decreases its speed from 80 km/hr to 60 km/hr in 5 s. Find the acceleration of the bus.

What do you mean by zero work, positive work and negative work?

A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the position of the ball in T/3 second?

The intensity of sound from a point source is 1.0 × 10−6m−2 at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source?

What is the difference between force and thrust?

1 Newton is equal to

Explain the statement “Wave transfer energy and not matter". ​​

A monkey hangs on a rope. The rope goes up over a pulley, and on the other end is an equal weight of block filled with bananas. Now the monkey starts climbing up the rope. What can be the possible cases as observed by a boy on the ground?

Which object is vibrating when the following sounds are produced ? (i) The sound of a sitar (ii) The sound of a tabla (iii) The sound of a tuning fork (iv) The buzzing of a bee or mosquito (v) The sound of a flute

Name two sound absorbing materials (or objects) which can make our big room less echoey.

Which wave property determines loudness?

A bucket filled with water is lowered from terrace to the ground floor with the help of rope. Is the work done by the gravitational force is positive or negative?

A bicycle initially moving with a velocity 5.0 m s−1 accelerates for 5 s at a rate of 2 m s−2. What will be its final velocity?

Draw a simple diagram of a hydraulic jack and explain its working.

Explain the statement “Wave transfer energy and not matter".