13232 + Interview Questions in Physics Page 196 InterviewSolution

9751.	The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42, 2.71 s and 2.80 s respectively. Find the average absolute error.
Answer» The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42, 2.71 s and 2.80 s respectively. Find the average absolute error.

Discussion

9752.	The absolute zero temperature in degree Fahrenheit is:
Answer» The absolute zero temperature in degree Fahrenheit is:

Discussion

9753.	Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum.They use different lenghts of the pendulum and record time for different number of oscillations.The observations are shown in the table.Least count for length = 0.1cm, Least count for time = 0.1s StudentLength of the pendulum(cm)Number of oscillations(n)Total time for (n) oscillation(s)Time period(s)I64.08128.016.0II64.0464.016.0III20.0436.09.0 If EI, EII and EIII are the percentage errors in g, i.e. (△gg×100) for student I, II and III, respectively, t = 2π√lg , then [IIT JEE 2008]
Answer» Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum.They use different lenghts of the pendulum and record time for different number of oscillations.The observations are shown in the table.Least count for length = 0.1cm, Least count for time = 0.1s $\begin{matrix} Student & Length of the pendulum(cm) & Number of oscillations(n) & Total time for (n) oscillation(s) & Time period(s) I & 64.0 & 8 & 128.0 & 16.0 II & 64.0 & 4 & 64.0 & 16.0 III & 20.0 & 4 & 36.0 & 9.0 \end{matrix}$ If $E_{I}$ , $E_{I I}$ and $E_{I I I}$ are the percentage errors in g, i.e. $(\frac{△ g}{g} \times 100)$ for student I, II and III, respectively, t = $2 π \sqrt{\frac{l}{g}}$ , then [IIT JEE 2008]

9753.

Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum.They use different lenghts of the pendulum and record time for different number of oscillations.The observations are shown in the table.Least count for length = 0.1cm, Least count for time = 0.1s StudentLength of the pendulum(cm)Number of oscillations(n)Total time for (n) oscillation(s)Time period(s)I64.08128.016.0II64.0464.016.0III20.0436.09.0 If EI, EII and EIII are the percentage errors in g, i.e. (△gg×100) for student I, II and III, respectively, t = 2π√lg , then [IIT JEE 2008]

Answer»

Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum.They use different lenghts of the pendulum and record time for different number of oscillations.The observations are shown in the table.Least count for length = 0.1cm, Least count for time = 0.1s

$\begin{matrix} Student & Length of the pendulum(cm) & Number of oscillations(n) & Total time for (n) oscillation(s) & Time period(s) I & 64.0 & 8 & 128.0 & 16.0 II & 64.0 & 4 & 64.0 & 16.0 III & 20.0 & 4 & 36.0 & 9.0 \end{matrix}$

If $E_{I}$ , $E_{I I}$ and $E_{I I I}$ are the percentage errors in g, i.e. $(\frac{△ g}{g} \times 100)$ for student I, II and III, respectively, t = $2 π \sqrt{\frac{l}{g}}$ , then

[IIT JEE 2008]

Discussion

9754.	Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour?
Answer» Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour?

Discussion

9755.	State how Newton's second law of motion differs from first law of motion?
Answer» State how Newton's second law of motion differs from first law of motion?

Discussion

9756.	respected ma'an/sir please tell what is intensity
Answer» respected ma'an/sir please tell what is intensity

Discussion

9757.	Pressure at the bottom of a tank containing a liquid does not depend on
Answer» Pressure at the bottom of a tank containing a liquid does not depend on

Discussion

9758.	Which of these can be the units of 'g' (acceleration due to gravity) ?
Answer» Which of these can be the units of 'g' (acceleration due to gravity) ?

Discussion

9759.	Do all bodies have the same inertia? Explain it with an example. [3 MARKS]
Answer» Do all bodies have the same inertia? Explain it with an example. [3 MARKS]

Discussion

9760.	Give reason : a) Dust particles move out when we beat a carpet with stick . b) luggage on the bus roof are tied with rope c) we feel jerks during stopping and sudden moving of a bus
Answer» Give reason : a) Dust particles move out when we beat a carpet with stick . b) luggage on the bus roof are tied with rope c) we feel jerks during stopping and sudden moving of a bus

9760.

Give reason : a) Dust particles move out when we beat a carpet with stick . b) luggage on the bus roof are tied with rope c) we feel jerks during stopping and sudden moving of a bus

Answer»

Give reason :

a) Dust particles move out when we beat a carpet with stick .

b) luggage on the bus roof are tied with rope

c) we feel jerks during stopping and sudden moving of a bus

Discussion

9761.	An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?
Answer» An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?

Discussion

9762.	State whether speed is a scalar or a vector quantity. Give a reason for your choice.
Answer» State whether speed is a scalar or a vector quantity. Give a reason for your choice.

Discussion

9763.	A solid cube of side a=5 cm has a mass of M=1000 g. It is recasted into a hollow cube of side b with air inside. What should be the minimum value of b, so that this hollow cube floats in this water? Consider air mass in cylinder to be negligible.
Answer» A solid cube of side $a = 5 c m$ has a mass of $M = 1000 g$ . It is recasted into a hollow cube of side $b$ with air inside. What should be the minimum value of $b$ , so that this hollow cube floats in this water? Consider air mass in cylinder to be negligible.

Discussion

9764.	State the principle of floatation.
Answer» State the principle of floatation.

Discussion

9765.	Consider the following two situations, in which case will the volume occupied by the sponge be greater? Situation 1: Sponge on a table Situation 2: Sponge soaked in water
Answer» Consider the following two situations, in which case will the volume occupied by the sponge be greater? Situation 1: Sponge on a table Situation 2: Sponge soaked in water

9765.

Consider the following two situations, in which case will the volume occupied by the sponge be greater? Situation 1: Sponge on a table Situation 2: Sponge soaked in water

Answer»

Consider the following two situations, in which case will the volume occupied by the sponge be greater?

Situation 1: Sponge on a table

Situation 2: Sponge soaked in water

Discussion

9766.	a water tank is fill to half of it,s maximum capacity moving some velocity applies brake suddenly. what happen to the water level?
Answer» a water tank is fill to half of it,s maximum capacity moving some velocity applies brake suddenly. what happen to the water level?

Discussion

9767.	An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?
Answer» An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?

9767.

An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?

Answer»

An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?

Discussion

9768.	The lengths of steel and copper rods are so that the length of the steel rod is 5 cm longer than that of the copper rod at all temperatures, then length of each rod, are (α for copper = 1.7 × 10−5/∘C and α for steel = 1.1 × 10−5/∘C) -
Answer» The lengths of steel and copper rods are so that the length of the steel rod is 5 cm longer than that of the copper rod at all temperatures, then length of each rod, are ( $α$ for copper = $1.7 \times 10^{- 5} /^{\circ} C$ and $α$ for steel = $1.1 \times 10^{- 5} /^{\circ} C$ ) -

Discussion

9769.	What is work?
Answer» What is work?

Discussion

9770.	Which of the following is/are the characteristics of circular motion?
Answer» Which of the following is/are the characteristics of circular motion?

Discussion

9771.	An object moves with a uniform velocity of 5 m/s when the net force acting on it is___.
Answer» An object moves with a uniform velocity of 5 m/s when the net force acting on it is___.

Discussion

9772.	What is a natural magnet? State two limitations of a natural magnet.
Answer» What is a natural magnet? State two limitations of a natural magnet.

Discussion

9773.	Is force needed to keep a moving body in motion?
Answer» Is force needed to keep a moving body in motion?

Discussion

9774.	A stone tied at the end of a string when whirled in a circular path with a uniform speed is
Answer» A stone tied at the end of a string when whirled in a circular path with a uniform speed is

Discussion

9775.	Q52. With reference to Gobardhan Yojna, which of the following statements is/are correct? 1. It would be implemented under Swacch Bharat Mission-Gramin. 2. This would help in generation of biogas, compost and bio-CNG. Which of the above statement(s) is/are correct?
Answer» Q52. With reference to Gobardhan Yojna, which of the following statements is/are correct? 1. It would be implemented under Swacch Bharat Mission-Gramin. 2. This would help in generation of biogas, compost and bio-CNG. Which of the above statement(s) is/are correct?

9775.

Q52. With reference to Gobardhan Yojna, which of the following statements is/are correct? 1. It would be implemented under Swacch Bharat Mission-Gramin. 2. This would help in generation of biogas, compost and bio-CNG. Which of the above statement(s) is/are correct?

Answer»

Q52. With reference to Gobardhan Yojna, which of the following statements is/are correct?

1. It would be implemented under Swacch Bharat Mission-Gramin.

2. This would help in generation of biogas, compost and bio-CNG.

Which of the above statement(s) is/are correct?

Discussion

9776.	A beaker of 2 litre is fully filled with a liquid. The value of the relative density of the liquid is 0.7. Find out the value of mass of the liquid. (Density of water =1 g cm−3 )
Answer» A beaker of 2 litre is fully filled with a liquid. The value of the relative density of the liquid is $0.7$ . Find out the value of mass of the liquid. (Density of water $= 1 g c m^{- 3}$ )

Discussion

9777.	In a vernier callipers there are 10 divisions on the vernier scale and 1cm on the main scale is divided in 10 parts. While measuring a length the zero of the vernier lies just ahead of 1.8cm mark and 4th division of vernier coincides with a main scale division. Find the length and the zero error of vernier calliper is -0.pick what is the correct length.
Answer» In a vernier callipers there are 10 divisions on the vernier scale and 1cm on the main scale is divided in 10 parts. While measuring a length the zero of the vernier lies just ahead of 1.8cm mark and 4th division of vernier coincides with a main scale division. Find the length and the zero error of vernier calliper is -0.pick what is the correct length.

9777.

In a vernier callipers there are 10 divisions on the vernier scale and 1cm on the main scale is divided in 10 parts. While measuring a length the zero of the vernier lies just ahead of 1.8cm mark and 4th division of vernier coincides with a main scale division. Find the length and the zero error of vernier calliper is -0.pick what is the correct length.

Answer»

In a vernier callipers there are 10 divisions on the vernier scale and 1cm on the main scale is divided in 10 parts. While measuring a length the zero of the vernier lies just ahead of 1.8cm mark and 4th division of vernier coincides with a main scale division.

Find the length and the zero error of vernier calliper is -0.pick what is the correct length.

Discussion

9778.	A boy weighing 600 N is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift?
Answer» A boy weighing $600 N$ is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift?

Discussion

9779.	Many people are familiar with the fact that a rifle recoils when fired. This recoil is the result of action-reaction force pairs. A gunpowder explosion creates hot gases that expand outward allowing the rifle to push forward on the bullet. The bullet pushes backwards upon the rifle. The acceleration of the recoiling rifle is
Answer» Many people are familiar with the fact that a rifle recoils when fired. This recoil is the result of action-reaction force pairs. A gunpowder explosion creates hot gases that expand outward allowing the rifle to push forward on the bullet. The bullet pushes backwards upon the rifle. The acceleration of the recoiling rifle is

Discussion

9780.	The two ends of a train moving with uniform acceleration pass a certain point with velocities u and v. The velocity with which the middle point of the train passes the same point is:
Answer» The two ends of a train moving with uniform acceleration pass a certain point with velocities u and v. The velocity with which the middle point of the train passes the same point is:

Discussion

9781.	A bike decreases its speed from 60 kmph to 40 kmph in 5 seconds. Find the acceleration of the bus.
Answer» A bike decreases its speed from $60 k m p h$ to $40 k m p h$ in $5 s e c o n d s$ . Find the acceleration of the bus.

Discussion

9782.	Internal energy in isochoric process is equal to work done in adiabatic process. Why does this happen?
Answer» Internal energy in isochoric process is equal to work done in adiabatic process. Why does this happen?

Discussion

9783.	An object moves with an acceleration of 3 m s−2 when a force of 30 N is applied. The mass of the body is:
Answer» An object moves with an acceleration of $3 {m s}^{- 2}$ when a force of $30 N$ is applied. The mass of the body is:

Discussion

9784.	A cannon ball of mass 2 kg is fired at a target 500 m away. The 400 kg cannon recoils with a velocity of 2 ms−1. Assuming cannon ball moves with constant velocity, when will it hit the target?
Answer» A cannon ball of mass $2 k g$ is fired at a target $500 m$ away. The $400 k g$ cannon recoils with a velocity of $2 m s^{- 1}$ . Assuming cannon ball moves with constant velocity, when will it hit the target?

Discussion

9785.	Question 3 Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Answer» Question 3 Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?

Discussion

9786.	What is the universal law of gravitation?
Answer» What is the universal law of gravitation?

Discussion

9787.	A plane has a takeoff speed of 120m/s and requires 2400 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed?
Answer» A plane has a takeoff speed of 120m/s and requires 2400 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed?

Discussion

9788.	Question 3 A hammer of mass 500 g, moving at 50 ms−1, strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?
Answer» Question 3 A hammer of mass 500 g, moving at $50 m s^{- 1}$ , strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?

Discussion

9789.	A solid body of volume V is completely immersed in a liquid of density D. What is the volume of the fluid displaced by the body?
Answer» A solid body of volume V is completely immersed in a liquid of density D. What is the volume of the fluid displaced by the body?

Discussion

9790.	A racing car has a uniform acceleration of 40 m/s2.What distance will it cover in 10s after start?
Answer» A racing car has a uniform acceleration of 40 $m / s^{2}$ .What distance will it cover in 10s after start?

Discussion

9791.	(a) Distinguish between longitudinal and transverse waves. (b) Are sound waves longitudinal or transverse ?
Answer» (a) Distinguish between longitudinal and transverse waves. (b) Are sound waves longitudinal or transverse ?

9791.

(a) Distinguish between longitudinal and transverse waves. (b) Are sound waves longitudinal or transverse ?

Answer»

(a) Distinguish between longitudinal and transverse waves.

(b) Are sound waves longitudinal or transverse ?

Discussion

9792.	On which factor does the value of universal gravitational constant G depends on?
Answer» On which factor does the value of universal gravitational constant G depends on?

Discussion

9793.	Difference between the valence band and conduction band.
Answer» Difference between the valence band and conduction band.

Discussion

9794.	Question 99 A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?
Answer» Question 99 A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?

9794.

Question 99 A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?

Answer»

Question 99

A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?

Discussion

9795.	State two advantages of an electromagnet over a permanent magnet.
Answer» State two advantages of an electromagnet over a permanent magnet.

Discussion

9796.	Which of the following can produce longitudinal waves as well as transverse waves under different conditions ? (a) water (b) TV transmitter (c) slinky (d) tuning fork
Answer» Which of the following can produce longitudinal waves as well as transverse waves under different conditions ? (a) water (b) TV transmitter (c) slinky (d) tuning fork

9796.

Which of the following can produce longitudinal waves as well as transverse waves under different conditions ? (a) water (b) TV transmitter (c) slinky (d) tuning fork

Answer»

Which of the following can produce longitudinal waves as well as transverse waves under different conditions ?

(a) water

(b) TV transmitter

(c) slinky

(d) tuning fork

Discussion

9797.	Which of the following is a contact force: (a) electrostatic force (b) gravitational force (c) Frictional force (d) magnetic force.
Answer» Which of the following is a contact force: (a) electrostatic force (b) gravitational force (c) Frictional force (d) magnetic force.

Discussion

9798.	When force applied is not in the direction of displacement of an object, is there any work done? Why work is said to be negative when force is applied opposite to the direction of displacement?
Answer» When force applied is not in the direction of displacement of an object, is there any work done? Why work is said to be negative when force is applied opposite to the direction of displacement?

9798.

When force applied is not in the direction of displacement of an object, is there any work done? Why work is said to be negative when force is applied opposite to the direction of displacement?

Answer»

When force applied is not in the direction of displacement of an object, is there any work done?

Why work is said to be negative when force is applied opposite to the direction of displacement?

Discussion

9799.	Why do we tend to fall outwards when a car takes a steep turn?
Answer» Why do we tend to fall outwards when a car takes a steep turn?

Discussion

9800.	Does light is also attracted by gravity ?
Answer» Does light is also attracted by gravity ?

Discussion

Explore topic-wise InterviewSolutions in .

The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42, 2.71 s and 2.80 s respectively. Find the average absolute error.

The absolute zero temperature in degree Fahrenheit is:

Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour?

State how Newton's second law of motion differs from first law of motion?

respected ma'an/sir please tell what is intensity

Pressure at the bottom of a tank containing a liquid does not depend on

Which of these can be the units of 'g' (acceleration due to gravity) ?

Do all bodies have the same inertia? Explain it with an example. [3 MARKS]

Give reason : a) Dust particles move out when we beat a carpet with stick . b) luggage on the bus roof are tied with rope c) we feel jerks during stopping and sudden moving of a bus

An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?

State whether speed is a scalar or a vector quantity. Give a reason for your choice.

A solid cube of side a=5 cm has a mass of M=1000 g. It is recasted into a hollow cube of side b with air inside. What should be the minimum value of b, so that this hollow cube floats in this water? Consider air mass in cylinder to be negligible.

State the principle of floatation.

Consider the following two situations, in which case will the volume occupied by the sponge be greater? Situation 1: Sponge on a table Situation 2: Sponge soaked in water

a water tank is fill to half of it,s maximum capacity moving some velocity applies brake suddenly. what happen to the water level?

An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?

The lengths of steel and copper rods are so that the length of the steel rod is 5 cm longer than that of the copper rod at all temperatures, then length of each rod, are (α for copper = 1.7 × 10−5/∘C and α for steel = 1.1 × 10−5/∘C) -

What is work?

Which of the following is/are the characteristics of circular motion?

An object moves with a uniform velocity of 5 m/s when the net force acting on it is___.

What is a natural magnet? State two limitations of a natural magnet.

Is force needed to keep a moving body in motion?

A stone tied at the end of a string when whirled in a circular path with a uniform speed is

Q52. With reference to Gobardhan Yojna, which of the following statements is/are correct? 1. It would be implemented under Swacch Bharat Mission-Gramin. 2. This would help in generation of biogas, compost and bio-CNG. Which of the above statement(s) is/are correct?

A beaker of 2 litre is fully filled with a liquid. The value of the relative density of the liquid is 0.7. Find out the value of mass of the liquid. (Density of water =1 g cm−3 )

A boy weighing 600 N is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift?

The two ends of a train moving with uniform acceleration pass a certain point with velocities u and v. The velocity with which the middle point of the train passes the same point is:

A bike decreases its speed from 60 kmph to 40 kmph in 5 seconds. Find the acceleration of the bus.

Internal energy in isochoric process is equal to work done in adiabatic process. Why does this happen?

An object moves with an acceleration of 3 m s−2 when a force of 30 N is applied. The mass of the body is:

A cannon ball of mass 2 kg is fired at a target 500 m away. The 400 kg cannon recoils with a velocity of 2 ms−1​. Assuming cannon ball moves with constant velocity, when will it hit the target?

Question 3 Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?

What is the universal law of gravitation?

A plane has a takeoff speed of 120m/s and requires 2400 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed?

Question 3 A hammer of mass 500 g, moving at 50 ms−1, strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?

A solid body of volume V is completely immersed in a liquid of density D. What is the volume of the fluid displaced by the body?

A racing car has a uniform acceleration of 40 m/s2.What distance will it cover in 10s after start?

(a) Distinguish between longitudinal and transverse waves. (b) Are sound waves longitudinal or transverse ?

On which factor does the value of universal gravitational constant G depends on?

Difference between the valence band and conduction band.

Question 99 A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?

State two advantages of an electromagnet over a permanent magnet.

Which of the following can produce longitudinal waves as well as transverse waves under different conditions ? (a) water (b) TV transmitter (c) slinky (d) tuning fork

Which of the following is a contact force: (a) electrostatic force (b) gravitational force (c) Frictional force (d) magnetic force.

When force applied is not in the direction of displacement of an object, is there any work done? Why work is said to be negative when force is applied opposite to the direction of displacement?

Why do we tend to fall outwards when a car takes a steep turn?

Does light is also attracted by gravity ?

A cannon ball of mass 2 kg is fired at a target 500 m away. The 400 kg cannon recoils with a velocity of 2 ms−1. Assuming cannon ball moves with constant velocity, when will it hit the target?