13232 + Interview Questions in Physics Page 197 InterviewSolution

9801.	A girl of mass 50 kg jumps out of a rowing boat of mass 300kg on to a bank, with a horizontal velocity of 3m/s. With what velocity does the boat begin to move backwards?
Answer» A girl of mass 50 kg jumps out of a rowing boat of mass 300kg on to a bank, with a horizontal velocity of 3m/s. With what velocity does the boat begin to move backwards?

Discussion

9802.	On a 120km/h track ,a train travels the first 30km at a uniform speed of 30km/h .how fast must the train travel the next 90 km somas to average 60km/h for the entire trip?
Answer» On a 120km/h track ,a train travels the first 30km at a uniform speed of 30km/h .how fast must the train travel the next 90 km somas to average 60km/h for the entire trip?

Discussion

9803.	What is electrical current that reverses its direction at a regular interval called?
Answer» What is electrical current that reverses its direction at a regular interval called?

Discussion

9804.	Can displacement be zero even if distance is not zero ? Give one example to explain your answer.
Answer» Can displacement be zero even if distance is not zero ? Give one example to explain your answer.

Discussion

9805.	The gravitational force between two point masses m1 and m2 at separation r is given by F=km1m2r2 The constant k
Answer» The gravitational force between two point masses $m_{1}$ and $m_{2}$ at separation r is given by $F = k \frac{m_{1} m_{2}}{r^{2}}$ The constant k

Discussion

9806.	Can I know how to define time
Answer» Can I know how to define time

Discussion

9807.	1 kg of ice at 0∘C is mixed with 1 kg of steam at 100∘C. What will be the composition of the system when thermal equilibrium is reached? Latent heat of fusion of ice = 3.36 × 105 J kg−1, specific heat capacity of water = 4200 J kg −1 K−1 and latent heat of vaporization of water = 2.26 × 106 J kg−1
Answer» 1 kg of ice at $0^{\circ} C$ is mixed with 1 kg of steam at $100^{\circ} C$ . What will be the composition of the system when thermal equilibrium is reached? Latent heat of fusion of ice = $3.36 \times 10^{5} J k g^{- 1}$ , specific heat capacity of water = 4200 J kg ⁻¹ K⁻¹ and latent heat of vaporization of water = $2.26 \times 10^{6} J k g^{- 1}$

Discussion

9808.	A cannon of mass 1000 kg can fire a bolt of 20 kg with a muzzle velocity of 300 m/s. If the cannon is free to move, the backward velocity of the cannon after the bolt is fired is
Answer» A cannon of mass $1000 k g$ can fire a bolt of $20 k g$ with a muzzle velocity of $300 m / s$ . If the cannon is free to move, the backward velocity of the cannon after the bolt is fired is

Discussion

9809.	why do fan make sound when slows down?
Answer» why do fan make sound when slows down?

Discussion

9810.	A force of 20N acts on a body whose weight is 9.8N. What is the mass of the body?
Answer» A force of 20N acts on a body whose weight is 9.8N. What is the mass of the body?

Discussion

9811.	The S.I. unit of acceleration is:
Answer» The S.I. unit of acceleration is:

Discussion

9812.	What is the relation between torque and angular momentum?
Answer» What is the relation between torque and angular momentum?

Discussion

9813.	A frontend loader applied 150 N of force to lift a stone and the work done is 1250 joules. How far was the rock lifted?
Answer» A frontend loader applied 150 N of force to lift a stone and the work done is 1250 joules. How far was the rock lifted?

Discussion

9814.	The main scale reading of a vernier calliper is obtained as 3.2 cm for an object placed in it. If the 4th division of the vernier scale coincides with a division on the main scale, and the magnitude of the positive zero error is 0.03 cm, what is the true length of the object in cm? Take L.C. = 0.01 cm.3.21
Answer» The main scale reading of a vernier calliper is obtained as 3.2 cm for an object placed in it. If the 4th division of the vernier scale coincides with a division on the main scale, and the magnitude of the positive zero error is 0.03 cm, what is the true length of the object in cm? Take L.C. = 0.01 cm. 3.21

Discussion

9815.	How do bats calculate the distance between them and their prey?
Answer» How do bats calculate the distance between them and their prey?

Discussion

9816.	Question 39 A gold sample contains 90% of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?
Answer» Question 39 A gold sample contains $90 %$ of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?

Discussion

9817.	Am i right in saying that the following are the series of action that take place when we hit a ball: We, by chemical energy produced by our body, move our hands to hit the ball. When our hands move this chemical energy gets converted into kinetic energy. As we hit the ball we do work on the ball and this kinetic energy gets transferred into the ball and the ball moves far away.
Answer» Am i right in saying that the following are the series of action that take place when we hit a ball: We, by chemical energy produced by our body, move our hands to hit the ball. When our hands move this chemical energy gets converted into kinetic energy. As we hit the ball we do work on the ball and this kinetic energy gets transferred into the ball and the ball moves far away.

Discussion

9818.	Is distance is equal to velocity *time?
Answer» Is distance is equal to velocity *time?

Discussion

9819.	Which of the following atomic mass of Uranium is the most radioactive?
Answer» Which of the following atomic mass of Uranium is the most radioactive?

Discussion

9820.	Differentiate between loudness and intensity.
Answer» Differentiate between loudness and intensity.

Discussion

9821.	Calculate the electric current flowing through the 20.5 Ω resistor in the following circuit.
Answer» Calculate the electric current flowing through the $20.5 Ω$ resistor in the following circuit.

Discussion

9822.	Calculate the resistivity of the material of a wire 2 m long , 0.4 mm in diameter and having a resistance 2 Ω.
Answer» Calculate the resistivity of the material of a wire $2 m$ long , $0.4 m m$ in diameter and having a resistance $2 Ω$ .

Discussion

9823.	A body moving with constant acceleration but with zero velocity. state whether the given situation is possible? explain giving an example.
Answer» A body moving with constant acceleration but with zero velocity. state whether the given situation is possible? explain giving an example.

Discussion

9824.	If we throw a wooden log and a metal of same mass and weight, then the metal will sink easily but the wooden log will float on water. Why?
Answer» If we throw a wooden log and a metal of same mass and weight, then the metal will sink easily but the wooden log will float on water. Why?

Discussion

9825.	An arrow shot from a bow attains a maximum height of 10 m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on arrow is _________ J. (Assume, g=10 m/s2)
Answer» An arrow shot from a bow attains a maximum height of $10 m$ from the level it is released. If the mass of the arrow is $500 g r a m s$ , work done by the bow on arrow is _________ $J$ . (Assume, $g = 10 m / s^{2}$ )

Discussion

9826.	The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source [CPMT 1999]to
Answer» The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source [CPMT 1999]to

9826.

The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source [CPMT 1999]to

Answer»

The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source

[CPMT 1999]to

Discussion

9827.	Name the waves used for sound ranging. State one reason for their use. Why are the waves mentioned by you not audible to us ?
Answer» Name the waves used for sound ranging. State one reason for their use. Why are the waves mentioned by you not audible to us ?

Discussion

9828.	Figure shows a small block of mass 'm' which is started with a speed 'v' on the horizontal part of the bigger block of mass 'M' placed on a horizontal floor. The curved part of the surface shown is semicircular. All the surfaces are frictionless. Find the speed of the bigger block when the smaller block reaches the point A of the surface.
Answer» Figure shows a small block of mass 'm' which is started with a speed 'v' on the horizontal part of the bigger block of mass 'M' placed on a horizontal floor. The curved part of the surface shown is semicircular. All the surfaces are frictionless. Find the speed of the bigger block when the smaller block reaches the point A of the surface.

9828.

Figure shows a small block of mass 'm' which is started with a speed 'v' on the horizontal part of the bigger block of mass 'M' placed on a horizontal floor. The curved part of the surface shown is semicircular. All the surfaces are frictionless. Find the speed of the bigger block when the smaller block reaches the point A of the surface.

Answer»

Figure shows a small block of mass 'm' which is started with a speed 'v' on the horizontal part of the bigger block of mass 'M' placed on a horizontal floor. The curved part of the surface shown is semicircular. All the surfaces are frictionless. Find the speed of the bigger block when the smaller block reaches the point A of the surface.

Discussion

9829.	A car and a scooter are traveling with the same speed, hence,their momentum will be same. Is it true or false? Explain.
Answer» A car and a scooter are traveling with the same speed, hence,their momentum will be same. Is it true or false? Explain.

Discussion

9830.	Why are Cu, Al used over tungsten (W), Fe to make fuses?
Answer» Why are Cu, Al used over tungsten (W), Fe to make fuses?

Discussion

9831.	When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper escapes in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is driven by:
Answer» When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper escapes in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is driven by:

Discussion

9832.	Two spring balances hooked and pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:
Answer» Two spring balances hooked and pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:

Discussion

9833.	A bus travels the first one-third distance at a speed of 10kmh, the next one-third at 20kmh and the last one-third at 60kmh. The average speed of the bus is
Answer» A bus travels the first one-third distance at a speed of 10 $\frac{k m}{h}$ , the next one-third at 20 $\frac{k m}{h}$ and the last one-third at 60 $\frac{k m}{h}$ . The average speed of the bus is

9833.

A bus travels the first one-third distance at a speed of 10kmh, the next one-third at 20kmh and the last one-third at 60kmh. The average speed of the bus is

Answer»

A bus travels the first one-third distance at a speed of 10 $\frac{k m}{h}$ , the next one-third at 20 $\frac{k m}{h}$ and the last one-third at 60 $\frac{k m}{h}$ . The average speed of the bus is

Discussion

9834.	The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be
Answer» The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be

9834.

The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be

Answer»

The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be

Discussion

9835.	I have a container that is 20cm tall and filled fully with water. The lift accelerates up at 10m/s/s. What is the pressure difference between the top surface of the water and the bottom of the container? Take density of water as 1kg/l.
Answer» I have a container that is 20cm tall and filled fully with water. The lift accelerates up at 10m/s/s. What is the pressure difference between the top surface of the water and the bottom of the container? Take density of water as 1kg/l.

Discussion

9836.	An aircraft travelling at 600 kmh accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft's altitude, how long will it take to reach the 'sound barrier'?
Answer» An aircraft travelling at 600 $k m h$ accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft's altitude, how long will it take to reach the 'sound barrier'?

Discussion

9837.	The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.
Answer» The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.

9837.

The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.

Answer»

The velocity-time graph of a train travelling between two stations, is plotted as below:

Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.

Discussion

9838.	Draw a displacement- distance graph of a wave and mark on it, the amplitude of wave by the letter a and wavelength of wave by the letter λ.
Answer» Draw a displacement- distance graph of a wave and mark on it, the amplitude of wave by the letter a and wavelength of wave by the letter $λ$ .

Discussion

9839.	Describe an experiment, using Archimedes' principle, to find relative density of a liquid.
Answer» Describe an experiment, using Archimedes' principle, to find relative density of a liquid.

Discussion

9840.	The frequency of oscillation of a seconds pendulum is ___s−1 or Hz
Answer» The frequency of oscillation of a seconds pendulum is ___ $s^{- 1}$ or Hz

Discussion

9841.	Figure below shows a flat car of mass 'M' on a frictionless road. A small massless wedge is fitted on it as shown. A small ball of mass 'm' is released from the top of the wedge, it slides over it and falls in the hole at distance 'l' from the initial position of the ball. Find the distance the flat car moves till the ball gets into the hole.
Answer» Figure below shows a flat car of mass 'M' on a frictionless road. A small massless wedge is fitted on it as shown. A small ball of mass 'm' is released from the top of the wedge, it slides over it and falls in the hole at distance 'l' from the initial position of the ball. Find the distance the flat car moves till the ball gets into the hole.

Discussion

9842.	A ball is thrown vertically upward with a speed of 10m/s from the top of a tower 200m high and another is thrown vertically downward with the same speed simultaneously. The time difference between them in reaching the ground in s is?
Answer» A ball is thrown vertically upward with a speed of 10m/s from the top of a tower 200m high and another is thrown vertically downward with the same speed simultaneously. The time difference between them in reaching the ground in s is?

Discussion

9843.	There are cracks and flaws in a metallic component used in construction of buildings. Explain how it can be detected? [3 MARKS]
Answer» There are cracks and flaws in a metallic component used in construction of buildings. Explain how it can be detected? [3 MARKS]

Discussion

9844.	Question 8 (b) Name the type of mirror used in the given situation. Side/rear-view mirror of a vehicle Support your answer with reason.
Answer» Question 8 (b) Name the type of mirror used in the given situation. Side/rear-view mirror of a vehicle Support your answer with reason.

Discussion

9845.	Question 45 Fill in the blanks to make the statements true. Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is ___.
Answer» Question 45 Fill in the blanks to make the statements true. Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is ___.

9845.

Question 45 Fill in the blanks to make the statements true. Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is ___.

Answer»

Question 45

Fill in the blanks to make the statements true.

Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is ___.

Discussion

9846.	A car travels with the uniform velocity of 25 m/s for five seconds. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 seconds. Find: 1)The distance which the car travelled before the brakes are applied 2)The retardation 3)The distance travelled b
Answer» A car travels with the uniform velocity of 25 m/s for five seconds. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 seconds. Find: 1)The distance which the car travelled before the brakes are applied 2)The retardation 3)The distance travelled b

Discussion

9847.	What is the principle of lactometer and hydrometer ?
Answer» What is the principle of lactometer and hydrometer ?

Discussion

9848.	Where dose we use weight and mass
Answer» Where dose we use weight and mass

Discussion

9849.	The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is
Answer» The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is

Discussion

9850.	Differentiate between density and relative density of a substance.
Answer» Differentiate between density and relative density of a substance.

Discussion

Explore topic-wise InterviewSolutions in .

A girl of mass 50 kg jumps out of a rowing boat of mass 300kg on to a bank, with a horizontal velocity of 3m/s. With what velocity does the boat begin to move backwards?

On a 120km/h track ,a train travels the first 30km at a uniform speed of 30km/h .how fast must the train travel the next 90 km somas to average 60km/h for the entire trip?

What is electrical current that reverses its direction at a regular interval called?

Can displacement be zero even if distance is not zero ? Give one example to explain your answer.

The gravitational force between two point masses m1 and m2 at separation r is given by F=km1m2r2 The constant k

Can I know how to define time

A cannon of mass 1000 kg can fire a bolt of 20 kg with a muzzle velocity of 300 m/s. If the cannon is free to move, the backward velocity of the cannon after the bolt is fired is

why do fan make sound when slows down?

A force of 20N acts on a body whose weight is 9.8N. What is the mass of the body?

The S.I. unit of acceleration is:

What is the relation between torque and angular momentum?

A frontend loader applied 150 N of force to lift a stone and the work done is 1250 joules. How far was the rock lifted?

How do bats calculate the distance between them and their prey?

Question 39 A gold sample contains 90% of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?

Is distance is equal to velocity *time?

Which of the following atomic mass of Uranium is the most radioactive?

Differentiate between loudness and intensity.

Calculate the electric current flowing through the 20.5 Ω resistor in the following circuit.

Calculate the resistivity of the material of a wire 2 m long , 0.4 mm in diameter and having a resistance 2 Ω.

A body moving with constant acceleration but with zero velocity. state whether the given situation is possible? explain giving an example.

If we throw a wooden log and a metal of same mass and weight, then the metal will sink easily but the wooden log will float on water. Why?

An arrow shot from a bow attains a maximum height of 10 m from the level it is released. If the mass of the arrow is 500 grams, work done by the bow on arrow is _________ J. (Assume, g=10 m/s2)

The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source [CPMT 1999]to

Name the waves used for sound ranging. State one reason for their use. Why are the waves mentioned by you not audible to us ?

A car and a scooter are traveling with the same speed, hence,their momentum will be same. Is it true or false? Explain.

Why are Cu, Al used over tungsten (W), Fe to make fuses?

When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper escapes in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is driven by:

Two spring balances hooked and pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:

A bus travels the first one-third​ distance at a speed of 10kmh, the next one-third​ at 20kmh and the last one-third at 60kmh. The average speed of the bus is

The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be

I have a container that is 20cm tall and filled fully with water. The lift accelerates up at 10m/s/s. What is the pressure difference between the top surface of the water and the bottom of the container? Take density of water as 1kg/l.

An aircraft travelling at 600 kmh accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft's altitude, how long will it take to reach the 'sound barrier'?

The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.

Draw a displacement- distance graph of a wave and mark on it, the amplitude of wave by the letter a and wavelength of wave by the letter λ.

Describe an experiment, using Archimedes' principle, to find relative density of a liquid.

The frequency of oscillation of a seconds pendulum is ___s−1 or Hz

A ball is thrown vertically upward with a speed of 10m/s from the top of a tower 200m high and another is thrown vertically downward with the same speed simultaneously. The time difference between them in reaching the ground in s is?

There are cracks and flaws in a metallic component used in construction of buildings. Explain how it can be detected? [3 MARKS]

Question 8 (b) Name the type of mirror used in the given situation. Side/rear-view mirror of a vehicle Support your answer with reason.

Question 45 Fill in the blanks to make the statements true. Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is ___.

A car travels with the uniform velocity of 25 m/s for five seconds. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 seconds. Find: 1)The distance which the car travelled before the brakes are applied 2)The retardation 3)The distance travelled b

What is the principle of lactometer and hydrometer ?

Where dose we use weight and mass

The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is

Differentiate between density and relative density of a substance.

A bus travels the first one-third distance at a speed of 10kmh, the next one-third at 20kmh and the last one-third at 60kmh. The average speed of the bus is