13232 + Interview Questions in Physics Page 198 InterviewSolution

9851.	A car of 1000 kg, is accelerating due to a net force 1200 N. If 4 people of mass 50 Kg board the car, then what is the new acceleration ? (in M/s2) ___
Answer» A car of 1000 kg, is accelerating due to a net force 1200 N. If 4 people of mass 50 Kg board the car, then what is the new acceleration ? (in M/s²) ___

Discussion

9852.	The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.
Answer» The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.

Discussion

9853.	One litre of water equals
Answer» One litre of water equals

Discussion

9854.	The given displacement-time graph represents which kind of motion? [1 MARK]
Answer» The given displacement-time graph represents which kind of motion? [1 MARK]

9854.

The given displacement-time graph represents which kind of motion? [1 MARK]

Answer»

The given displacement-time graph represents which kind of motion? [1 MARK]

Discussion

9855.	How is the total energy of the system conserved?
Answer» How is the total energy of the system conserved?

Discussion

9856.	What is the physical significance of inertia?
Answer» What is the physical significance of inertia?

Discussion

9857.	Current in metals is due to___.
Answer» Current in metals is due to___.

Discussion

9858.	Following observations are taken while finding the relative density of cork. Find the relative density of the cork. (I) Weight of sinker in water = 12.6 g (II) Weight of sinker in water + cork in air = 13.7 g (III) Weight of sinker and cork, both in water = 10.5 g
Answer» Following observations are taken while finding the relative density of cork. Find the relative density of the cork. (I) Weight of sinker in water = 12.6 g (II) Weight of sinker in water + cork in air = 13.7 g (III) Weight of sinker and cork, both in water = 10.5 g

9858.

Following observations are taken while finding the relative density of cork. Find the relative density of the cork. (I) Weight of sinker in water = 12.6 g (II) Weight of sinker in water + cork in air = 13.7 g (III) Weight of sinker and cork, both in water = 10.5 g

Answer»

Following observations are taken while finding the relative density of cork. Find the relative density of the cork.

(I) Weight of sinker in water = 12.6 g
(II) Weight of sinker in water + cork in air = 13.7 g
(III) Weight of sinker and cork, both in water = 10.5 g

Discussion

9859.	A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20 cm, 30 cm, 45 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from
Answer» A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20 cm, 30 cm, 45 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from

Discussion

9860.	A stone dropped from the top of a tower of height 300 m splashes into a pond of water at its base. When will the sound of the splash be heard at the top? (Velocity of sound = 340 ms−1 and g = 9.8 ms−2)
Answer» A stone dropped from the top of a tower of height 300 m splashes into a pond of water at its base. When will the sound of the splash be heard at the top? (Velocity of sound = $340 m s^{- 1}$ and g = 9.8 $m s^{- 2}$ )

Discussion

9861.	If Michael Jordan has a vertical leap of 1.29 m, then what is his take off speed and his hang time (total time to move upwards to the peak and then return to the ground)?
Answer» If Michael Jordan has a vertical leap of 1.29 m, then what is his take off speed and his hang time (total time to move upwards to the peak and then return to the ground)?

Discussion

9862.	If a ball is dropped from a height H above the ground, then which of the following is the correct graph for total energy(TE) vs height from the ground(h)?
Answer» If a ball is dropped from a height H above the ground, then which of the following is the correct graph for total energy(TE) vs height from the ground(h)?

Discussion

9863.	Momentum of a body of mass 0.5 kg moving with a speed of 10 m/s is
Answer» Momentum of a body of mass 0.5 kg moving with a speed of 10 m/s is

Discussion

9864.	Which one of the following is a Class II levers?
Answer» Which one of the following is a $C l a s s I I l e v e r s$ ?

Discussion

9865.	Sophia was counting the number of crystals in 5kg of sugar. Can you help her to find the number of crystals in 5kg without actual counting, if 12kg of sugar contains 24×104 crystals?
Answer» Sophia was counting the number of crystals in 5kg of sugar. Can you help her to find the number of crystals in 5kg without actual counting, if 12kg of sugar contains $24 \times 10^{4}$ crystals?

Discussion

9866.	What will be the displacement when a moving car returns to the starting point?
Answer» What will be the displacement when a moving car returns to the starting point?

Discussion

9867.	The coefficient of apparent expansion of a liquid when determined using two different vessels A and B are γ1 and γ2 respectively. If the coefficient of linear expansion of vessel A is α, the coefficient of linear expansion of vessel B is
Answer» The coefficient of apparent expansion of a liquid when determined using two different vessels A and B are $γ_{1}$ and $γ_{2}$ respectively. If the coefficient of linear expansion of vessel A is $α$ , the coefficient of linear expansion of vessel B is

Discussion

9868.	The coefficient of volumetric expansion of mercury is 8×10−5∘C. A thermometer bulb has a volume 10−6m3 and cross section of stem is 0.004cm2. Assuming that bulb is filled with mercury at 0∘C, then the length of the mercury column at 100∘C is:
Answer» The coefficient of volumetric expansion of mercury is $8 \times 10^{- 5}^{\circ} C$ . A thermometer bulb has a volume $10^{- 6} m^{3}$ and cross section of stem is $0.004 c m^{2}$ . Assuming that bulb is filled with mercury at $0^{\circ} C$ , then the length of the mercury column at $100^{\circ} C$ is:

Discussion

9869.	The unit of resistivity is ____________
Answer» The unit of resistivity is ____________

Discussion

9870.	By driving at 4/5th of my usual speed, I reach my office 10 minutes later than usual. What is my usual time of travel (in minutes)?
Answer» By driving at 4/5^th of my usual speed, I reach my office 10 minutes later than usual. What is my usual time of travel (in minutes)?

Discussion

9871.	Which of the following correctly relates the wavelength λ, frequency f and velocity v of sound?
Answer» Which of the following correctly relates the wavelength λ, frequency f and velocity v of sound?

Discussion

9872.	How can we define 1 coulomb of charge?
Answer» How can we define 1 coulomb of charge?

Discussion

9873.	A body of mass m falls down through a height h. Find the work done by gravity.
Answer» A body of mass m falls down through a height h. Find the work done by gravity.

Discussion

9874.	what is the value of (30+40+50)?
Answer» what is the value of ( $3^{0}$ + $4^{0}$ + $5^{0}$ )?

Discussion

9875.	What are the differences between the mass of an object and its weight? [5 MARK]
Answer» What are the differences between the mass of an object and its weight? [5 MARK]

Discussion

9876.	In transverse waves, particles:
Answer» In transverse waves, particles:

Discussion

9877.	Define one ohm. A resistance of 6 ohms is connected in series with another resistance of 4 ohms. A potential difference of 20 volts is applied across the combination. Calculate the current through the circuit and potential difference across the 6 ohm resistance. [5 MARKS]
Answer» Define one ohm. A resistance of 6 ohms is connected in series with another resistance of 4 ohms. A potential difference of 20 volts is applied across the combination. Calculate the current through the circuit and potential difference across the 6 ohm resistance. [5 MARKS]

Discussion

9878.	A constant force F = m2g/2 is applied on the block of mass m1 as shown in figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of m1 is
Answer» A constant force F = $m_{2} g / 2$ is applied on the block of mass $m_{1}$ as shown in figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of $m_{1}$ is

9878.

A constant force F = m2g/2 is applied on the block of mass m1 as shown in figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of m1 is

Answer»

A constant force F = $m_{2} g / 2$ is applied on the block of mass $m_{1}$ as shown in figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of $m_{1}$ is

Discussion

9879.	In above 3 figures, the arrows indicate the direction of force, and magnitude of force is written above/below the arrows. Which box is experiencing balanced force?
Answer» In above 3 figures, the arrows indicate the direction of force, and magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

9879.

In above 3 figures, the arrows indicate the direction of force, and magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

Answer»

In above 3 figures, the arrows indicate the direction of force, and magnitude of force is written above/below the arrows.

Which box is experiencing balanced force?

Discussion

9880.	Question 6 In the relation F=GMmd2, the quantity G (a) depends on the value of g at the place of observation (b) is used only when the earth is one of the two masses (c) is greatest at the surface of the earth (d) is universal constant of nature
Answer» Question 6 In the relation $F = \frac{G M m}{d^{2}}$ , the quantity G (a) depends on the value of g at the place of observation (b) is used only when the earth is one of the two masses (c) is greatest at the surface of the earth (d) is universal constant of nature

Discussion

9881.	A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
Answer» A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.

Discussion

9882.	A bullet of mass 20 g is fired from a rifle of mass 5 kg, with a velocity of 180 m s−1. What is the recoil velocity (in m s−1 ) of the rifle?-0.72
Answer» A bullet of mass $20 g$ is fired from a rifle of mass $5 kg$ , with a velocity of $180 {m s}^{- 1}$ . What is the recoil velocity (in ${m s}^{- 1}$ ) of the rifle? -0.72

Discussion

9883.	A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below(the magnetic field is from left to right). What is the direction of induced current?
Answer» A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below(the magnetic field is from left to right). What is the direction of induced current?

Discussion

9884.	A body weighs 600 g in air, 450 g in water and 480 g in a liquid. Then, the relative density of the solid is:
Answer» A body weighs 600 g in air, 450 g in water and 480 g in a liquid. Then, the relative density of the solid is:

Discussion

9885.	A boy whose mass is 75 kg holds in his hands a bag weighing 40 N. With what force does the floor push up on his feet ? (Take g=9.8 m/s2)
Answer» A boy whose mass is 75 kg holds in his hands a bag weighing 40 N. With what force does the floor push up on his feet ? (Take g=9.8 m/s²⁾

Discussion

9886.	A particle moves along a semicircle of radius 10 m in 5 seconds. The magnitude of average velocity of the particle is
Answer» A particle moves along a semicircle of radius $10 m$ in 5 seconds. The magnitude of average velocity of the particle is

Discussion

9887.	A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection.The correct statement is: (a) the average velocity is 2ht (b) the acceleration is zero (c) the final velocity on reaching the point of projection is 2u. (d) the displacement is zero.
Answer» A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection.The correct statement is: (a) the average velocity is $\frac{2 h}{t}$ (b) the acceleration is zero (c) the final velocity on reaching the point of projection is 2u. (d) the displacement is zero.

9887.

A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection.The correct statement is: (a) the average velocity is 2ht (b) the acceleration is zero (c) the final velocity on reaching the point of projection is 2u. (d) the displacement is zero.

Answer»

A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection.The correct statement is:

(a) the average velocity is $\frac{2 h}{t}$

(b) the acceleration is zero

(c) the final velocity on reaching the point of projection is 2u.

(d) the displacement is zero.

Discussion

9888.	A force is needed to: (a) change the state of motion or state of rest of the body (b) keep the body in motion (c) keep the body stationary (d) keep the velocity of body constant.
Answer» A force is needed to: (a) change the state of motion or state of rest of the body (b) keep the body in motion (c) keep the body stationary (d) keep the velocity of body constant.

Discussion

9889.	What do you mean by the term frequency of a wave ? State its S.I. unit.
Answer» What do you mean by the term frequency of a wave ? State its S.I. unit.

Discussion

9890.	How is the working of an electric bell affected, if alternating current be used instead of direct current ?
Answer» How is the working of an electric bell affected, if alternating current be used instead of direct current ?

Discussion

9891.	The figures below show that a submarine can either sink or float even though the upthrust acting on it is the same. What is the relationship between the weight of submarine and the upthrust when the submarine sinks in water?
Answer» The figures below show that a submarine can either sink or float even though the upthrust acting on it is the same. What is the relationship between the weight of submarine and the upthrust when the submarine sinks in water?

Discussion

9892.	If linear momentum of a particle becomes n times by what factor it's kinetic energy changes?
Answer» If linear momentum of a particle becomes n times by what factor it's kinetic energy changes?

Discussion

9893.	The work done on a body is 5 J. If the displacement of the body is 5 m in the direction of force, Calculate the force applied on the body (in Newton).1
Answer» The work done on a body is $5 J$ . If the displacement of the body is $5 m$ in the direction of force, Calculate the force applied on the body (in Newton). 1

Discussion

9894.	Why are grooves made on a saucer where the tea cup is placed ? Which law will you use to support your answer?
Answer» Why are grooves made on a saucer where the tea cup is placed ? Which law will you use to support your answer?

Discussion

9895.	magnetic field is ___________ dimensional . How?
Answer» magnetic field is ___________ dimensional . How?

Discussion

9896.	What is known as electrostatic force?
Answer» What is known as electrostatic force?

Discussion

9897.	If the shape of the wire is changed , will the resistance change?Explain
Answer» If the shape of the wire is changed , will the resistance change?Explain

Discussion

9898.	The troops equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing?
Answer» The troops equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing?

Discussion

9899.	Can there be displacement on an object in the absence of any force acting on it? Explain
Answer» Can there be displacement on an object in the absence of any force acting on it? Explain

Discussion

9900.	Light is falling on surfaces S1, S2, and S3 as shown in the figure. Surfaces on which the angle of incidence is equal to the angle of reflection is/are
Answer» Light is falling on surfaces $S_{1}, S_{2}, a n d S_{3}$ as shown in the figure. Surfaces on which the angle of incidence is equal to the angle of reflection is/are

Discussion

Explore topic-wise InterviewSolutions in .

A car of 1000 kg, is accelerating due to a net force 1200 N. If 4 people of mass 50 Kg board the car, then what is the new acceleration ? (in M/s2) ___

The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.

One litre of water equals

The given displacement-time graph represents which kind of motion? [1 MARK]

How is the total energy of the system conserved?

What is the physical significance of inertia?

Current in metals is due to___.

Following observations are taken while finding the relative density of cork. Find the relative density of the cork. (I) Weight of sinker in water = 12.6 g (II) Weight of sinker in water + cork in air = 13.7 g (III) Weight of sinker and cork, both in water = 10.5 g

A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20 cm, 30 cm, 45 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from

A stone dropped from the top of a tower of height 300 m splashes into a pond of water at its base. When will the sound of the splash be heard at the top? (Velocity of sound = 340 ms−1 and g = 9.8 ms−2)

If Michael Jordan has a vertical leap of 1.29 m, then what is his take off speed and his hang time (total time to move upwards to the peak and then return to the ground)?

If a ball is dropped from a height H above the ground, then which of the following is the correct graph for total energy(TE) vs height from the ground(h)?

Momentum of a body of mass 0.5 kg moving with a speed of 10 m/s is

Which one of the following is a Class II levers?

Sophia was counting the number of crystals in 5kg of sugar. Can you help her to find the number of crystals in 5kg without actual counting, if 12kg of sugar contains 24×104 crystals?

What will be the displacement when a moving car returns to the starting point?

The coefficient of apparent expansion of a liquid when determined using two different vessels A and B are γ1 and γ2 respectively. If the coefficient of linear expansion of vessel A is α, the coefficient of linear expansion of vessel B is

The coefficient of volumetric expansion of mercury is 8×10−5∘C. A thermometer bulb has a volume 10−6m3 and cross section of stem is 0.004cm2. Assuming that bulb is filled with mercury at 0∘C, then the length of the mercury column at 100∘C is:

The unit of resistivity is ____________

By driving at 4/5th of my usual speed, I reach my office 10 minutes later than usual. What is my usual time of travel (in minutes)?

Which of the following correctly relates the wavelength λ, frequency f and velocity v of sound?

How can we define 1 coulomb of charge?

A body of mass m falls down through a height h. Find the work done by gravity.

what is the value of (30+40+50)?

What are the differences between the mass of an object and its weight? [5 MARK]

In transverse waves, particles:

Define one ohm. A resistance of 6 ohms is connected in series with another resistance of 4 ohms. A potential difference of 20 volts is applied across the combination. Calculate the current through the circuit and potential difference across the 6 ohm resistance. [5 MARKS]

A constant force F = m2g/2 is applied on the block of mass m1 as shown in figure. The string and the pulley are light and the surface of the table is smooth. The acceleration of m1 is

In above 3 figures, the arrows indicate the direction of force, and magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

Question 6 In the relation F=GMmd2, the quantity G (a) depends on the value of g at the place of observation (b) is used only when the earth is one of the two masses (c) is greatest at the surface of the earth (d) is universal constant of nature

A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.

A bullet of mass 20 g is fired from a rifle of mass 5 kg, with a velocity of 180 m s−1. What is the recoil velocity (in m s−1 ) of the rifle?-0.72

A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below(the magnetic field is from left to right). What is the direction of induced current?

A body weighs 600 g in air, 450 g in water and 480 g in a liquid. Then, the relative density of the solid is:

A boy whose mass is 75 kg holds in his hands a bag weighing 40 N. With what force does the floor push up on his feet ? (Take g=9.8 m/s2)

A particle moves along a semicircle of radius 10 m in 5 seconds. The magnitude of average velocity of the particle is

A force is needed to: (a) change the state of motion or state of rest of the body (b) keep the body in motion (c) keep the body stationary (d) keep the velocity of body constant.

What do you mean by the term frequency of a wave ? State its S.I. unit.

How is the working of an electric bell affected, if alternating current be used instead of direct current ?

The figures below show that a submarine can either sink or float even though the upthrust acting on it is the same. What is the relationship between the weight of submarine and the upthrust when the submarine sinks in water?

If linear momentum of a particle becomes n times by what factor it's kinetic energy changes?

The work done on a body is 5 J. If the displacement of the body is 5 m in the direction of force, Calculate the force applied on the body (in Newton).1

Why are grooves made on a saucer where the tea cup is placed ? Which law will you use to support your answer?

magnetic field is ___________ dimensional . How?

What is known as electrostatic force?

If the shape of the wire is changed , will the resistance change?Explain

The troops equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing?

Can there be displacement on an object in the absence of any force acting on it? Explain

Light is falling on surfaces S1, S2, and S3 as shown in the figure. Surfaces on which the angle of incidence is equal to the angle of reflection is/are