13232 + Interview Questions in Physics Page 166 InterviewSolution

8251.	Quality of a musical note depends on
Answer» Quality of a musical note depends on

8251.

Quality of a musical note depends on

Answer»

Quality of a musical note depends on

8252.	If two balls one of iron and the other of aluminum experiences same upthrust when dipped in water then, ___.
Answer» If two balls one of iron and the other of aluminum experiences same upthrust when dipped in water then, ___.

Discussion

8253.	A body starts with an initial velocity of 10 m s−1 and acceleration 5 m s−2.Find the distance covered by the body in 5 s.
Answer» A body starts with an initial velocity of 10 $m s^{- 1}$ and acceleration 5 $m s^{- 2}$ .Find the distance covered by the body in 5 s.

Discussion

8254.	Difference between speed and acceleration
Answer» Difference between speed and acceleration

Discussion

8255.	A bullet of mass 10 g travlling horizontally with a velocity of 150 m s-1 strikes a stationary wooden block and comes to rest in 0.03 s . Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet
Answer» A bullet of mass 10 g travlling horizontally with a velocity of 150 m s^-1 strikes a stationary wooden block and comes to rest in 0.03_s. Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet

Discussion

8256.	DIRECTIONS : Match Column-I with Colum-II and select the correct answer using the codes given below the columns. Column−IColumn−IIA. Electric motorP. Electrical energy to sound energyB. Electric bellQ. Electrical energy to mechanical energyC. Electric bulbR. Light energy to electrical energyD. Photoelectric cellS. Heat energy to mechanicalE. Steam engineT. Electric energy to light energy
Answer» DIRECTIONS : Match Column-I with Colum-II and select the correct answer using the codes given below the columns. $\begin{matrix} C o l u m n - I & C o l u m n - I I A . E l e c t r i c m o t o r & P . E l e c t r i c a l e n e r g y t o s o u n d e n e r g y B . E l e c t r i c b e l l & Q . E l e c t r i c a l e n e r g y t o m e c h a n i c a l e n e r g y C . E l e c t r i c b u l b & R . L i g h t e n e r g y t o e l e c t r i c a l e n e r g y D . P h o t o e l e c t r i c c e l l & S . H e a t e n e r g y t o m e c h a n i c a l E . S t e a m e n g i n e & T . E l e c t r i c e n e r g y t o l i g h t e n e r g y \end{matrix}$

Discussion

8257.	A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is:
Answer» A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is:

Discussion

8258.	A sound wave having a wavelength of 2 cm is travelling in water. If the velocity of sound in water is 1600 ms−1. What is the frequency of the sound wave?
Answer» A sound wave having a wavelength of $2 c m$ is travelling in water. If the velocity of sound in water is $1600 m s^{- 1}$ . What is the frequency of the sound wave?

Discussion

8259.	A piece of wood of relative density 0.25 floats in a pot containing oil of relative density 0.81. What will be the fraction of volume of the wood above the surface of the oil. (density of water = 1000 kg/m3)
Answer» A piece of wood of relative density 0.25 floats in a pot containing oil of relative density 0.81. What will be the fraction of volume of the wood above the surface of the oil. (density of water = 1000 kg/ $m^{3}$ )

Discussion

8260.	When the velocity is variable i.e., when the motion is accelerated. The displacement - time graph will not be straight line since the displacement will not be proportional to the time because ‘v’ is not constant; but it will be a curve, the nature of the curve depending of the nature of the variation in the velocity. Draw a graph to illustrate this.
Answer» When the velocity is variable i.e., when the motion is accelerated. The displacement - time graph will not be straight line since the displacement will not be proportional to the time because ‘v’ is not constant; but it will be a curve, the nature of the curve depending of the nature of the variation in the velocity. Draw a graph to illustrate this.

Discussion

8261.	Question 4 A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
Answer» Question 4 A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

Discussion

8262.	The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?
Answer» The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

8262.

The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

Answer»

The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

Discussion

8263.	State the law of conservation of momentum.
Answer» State the law of conservation of momentum.

Discussion

8264.	Question 6 Which one of the following is not the unit of energy? (a) joule (b) newton metre (c) kilowatt (d) kilowatt hour
Answer» Question 6 Which one of the following is not the unit of energy? (a) joule (b) newton metre (c) kilowatt (d) kilowatt hour

Discussion

8265.	If the force applied is F and the velocity gained is v, then the power developed is:
Answer» If the force applied is F and the velocity gained is v, then the power developed is:

Discussion

8266.	Why is a force needed to keep a block of wood inside water?
Answer» Why is a force needed to keep a block of wood inside water?

Discussion

8267.	Name that part of ear which vibrates when outside sound falls on it.
Answer» Name that part of ear which vibrates when outside sound falls on it.

Discussion

8268.	Expiation of law's of motion
Answer» Expiation of law's of motion

Discussion

8269.	Define compressibility.
Answer» Define compressibility.

Discussion

8270.	The distance of a galaxy from the earth is 5.6 × 1025 m. Assuming the speed of light to be 3 × 108 m S−1 find the time taken by light to travel this distance.
Answer» The distance of a galaxy from the earth is 5.6 $\times$ 10 $^{25}$ m. Assuming the speed of light to be 3 $\times$ 10 $^{8}$ m S $^{- 1}$ find the time taken by light to travel this distance.

Discussion

8271.	A body of mass 25kg has a momentum of 125kg m/s . Calculate velocity of the body.
Answer» A body of mass 25kg has a momentum of 125kg m/s . Calculate velocity of the body.

Discussion

8272.	I have not understood this definition of the Newton's Second Law of Motion: The rate of change of momentum is directly proportional to the applied force, in the direction of the motion. Please explain to me what is rate of change of momentum and please give examples
Answer» I have not understood this definition of the Newton's Second Law of Motion: The rate of change of momentum is directly proportional to the applied force, in the direction of the motion. Please explain to me what is rate of change of momentum and please give examples

Discussion

8273.	Under what condition, the average speed is equal to the magnitude of the average velocity.
Answer» Under what condition, the average speed is equal to the magnitude of the average velocity.

Discussion

8274.	Due to which property of a body ,it will tend to remain in the position of rest:
Answer» Due to which property of a body ,it will tend to remain in the position of rest:

8274.

Due to which property of a body ,it will tend to remain in the position of rest:

Answer»

Due to which property of a body ,it will tend to remain in the position of rest:

Discussion

8275.	10 g of a gas at 2 atm pressure is cooled from 273o C to 273K. Keeping its volume constant. The pressure of the gas will be equal to ___ atm.
Answer» 10 g of a gas at 2 atm pressure is cooled from $273^{o} C$ to 273K. Keeping its volume constant. The pressure of the gas will be equal to ___ atm.

Discussion

8276.	All the values and formulas from lesson gravitation
Answer» All the values and formulas from lesson gravitation

Discussion

8277.	Why can't a clinical thermometer be used in a laboratory
Answer» Why can't a clinical thermometer be used in a laboratory

Discussion

8278.	A tennis ball of mass 0.11 kg travelling at 40 m per second hits a wall head on and bounces of returning along the same path at 30 M per second calculate the change in velocity of the ball as well as the change in momentum of that ball including the unit in your answer
Answer» A tennis ball of mass 0.11 kg travelling at 40 m per second hits a wall head on and bounces of returning along the same path at 30 M per second calculate the change in velocity of the ball as well as the change in momentum of that ball including the unit in your answer

Discussion

8279.	A farmer moves along the boundary of a square field of side 10 metre in 40 sec. What will be the magnitude of displacement of the farmer at the end of 2 minutes in 20 sec.from his initial position?
Answer» A farmer moves along the boundary of a square field of side 10 metre in 40 sec. What will be the magnitude of displacement of the farmer at the end of 2 minutes in 20 sec.from his initial position?

Discussion

8280.	Which of the following barometer can be used as an altimeter?
Answer» Which of the following barometer can be used as an altimeter?

Discussion

8281.	Two spring balances 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 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

8282.	derive the equation for uniform accelerated motion for the displacement covered in its Nth second.(sn=u+a(n-1\2)
Answer» derive the equation for uniform accelerated motion for the displacement covered in its Nth second.(s_n=u+a(n-1\2)

Discussion

8283.	A stone is thrown vertically upwards with a velocity of 40 m/s. At what height will its kinetic energy and potential energy be equal?
Answer» A stone is thrown vertically upwards with a velocity of 40 m/s. At what height will its kinetic energy and potential energy be equal?

Discussion

8284.	While measuring the length of a rod with a vernier callipers, Fig. 1.14 below shows the position of its scales. What is the length of the rod ?
Answer» While measuring the length of a rod with a vernier callipers, Fig. 1.14 below shows the position of its scales. What is the length of the rod ?

8284.

While measuring the length of a rod with a vernier callipers, Fig. 1.14 below shows the position of its scales. What is the length of the rod ?

Answer»

While measuring the length of a rod with a vernier callipers, Fig. 1.14 below shows the position of its scales. What is the length of the rod ?

Discussion

8285.	Why do astronauts grow taller in space?
Answer» Why do astronauts grow taller in space?

Discussion

8286.	What is a seconds' pendulum?
Answer» What is a seconds' pendulum?

Discussion

8287.	The side of a cube is measured by a vernier caliper (10 divisions of a vernier scale coincide with 9 divisions of main scale, where 1 division of main scale is 1 mm). The main scale reads 10 mm and first division of vernier scale coincides with the main scale. Mass of the cube is 2.736g. Find the density of the cube in appropriate significant figures.
Answer» The side of a cube is measured by a vernier caliper (10 divisions of a vernier scale coincide with 9 divisions of main scale, where 1 division of main scale is 1 mm). The main scale reads 10 mm and first division of vernier scale coincides with the main scale. Mass of the cube is 2.736g. Find the density of the cube in appropriate significant figures.

Discussion

8288.	What will happento earth on the basis of gravitation if the sun dissapears
Answer» What will happento earth on the basis of gravitation if the sun dissapears

Discussion

8289.	If A and B are two bodies of masses 20kg and 40kg respectively, then:
Answer» If A and B are two bodies of masses 20kg and 40kg respectively, then:

Discussion

8290.	The 4kg head of a sledgehammer is moving at 6 m/s when strike a spike dividing into a log,the duration of impact is 2ms.find the time average of the impact force.
Answer» The 4kg head of a sledgehammer is moving at 6 m/s when strike a spike dividing into a log,the duration of impact is 2ms.find the time average of the impact force.

Discussion

8291.	A man throws a ball weighing 200 g vertically upwards with a speed of 10m/s. Its momentum at the highest point of its flight will be:
Answer» A man throws a ball weighing 200 g vertically upwards with a speed of 10m/s. Its momentum at the highest point of its flight will be:

Discussion

8292.	A plastic mug full of water appears lighter inside water due to
Answer» A plastic mug full of water appears lighter inside water due to

Discussion

8293.	How much energy does a 150 W steam iron consume per second?
Answer» How much energy does a 150 W steam iron consume per second?

Discussion

8294.	In which of the following ways of charging is charge shared?
Answer» In which of the following ways of charging is charge shared?

Discussion

8295.	Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
Answer» Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.

Discussion

8296.	What is the maximum number of quantities you can imagine the time period of pendulum to depend upon?
Answer» What is the maximum number of quantities you can imagine the time period of pendulum to depend upon?

Discussion

8297.	What would be the relation between velocities of gun and bullet, if the mass of gun is more than the mass of bullet?
Answer» What would be the relation between velocities of gun and bullet, if the mass of gun is more than the mass of bullet?

Discussion

8298.	How are the following derived units related to the fundamental units ? (a) newton (b) watt (c) joule (d) pascal.
Answer» How are the following derived units related to the fundamental units ? (a) newton (b) watt (c) joule (d) pascal.

8298.

How are the following derived units related to the fundamental units ? (a) newton (b) watt (c) joule (d) pascal.

Answer»

How are the following derived units related to the fundamental units ?

(a) newton (b) watt

(c) joule (d) pascal.

Discussion

8299.	Carpet is beaten with a stick, dust will come out. Why does this happen?
Answer» Carpet is beaten with a stick, dust will come out. Why does this happen?

Discussion

8300.	The power output of an engine is 3 kW. How much work does the engine do in 20 s ?
Answer» The power output of an engine is 3 kW. How much work does the engine do in 20 s ?

Discussion

Explore topic-wise InterviewSolutions in .

Quality of a musical note depends on

If two balls one of iron and the other of aluminum experiences same upthrust when dipped in water then, ___.

A body starts with an initial velocity of 10 m s−1 and acceleration 5 m s−2.Find the distance covered by the body in 5 s.

Difference between speed and acceleration

A bullet of mass 10 g travlling horizontally with a velocity of 150 m s-1 strikes a stationary wooden block and comes to rest in 0.03 s . Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet

A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is:

A sound wave having a wavelength of 2 cm is travelling in water. If the velocity of sound in water is 1600 ms−1. What is the frequency of the sound wave?

A piece of wood of relative density 0.25 floats in a pot containing oil of relative density 0.81. What will be the fraction of volume of the wood above the surface of the oil. (density of water = 1000 kg/m3)

Question 4 A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?

The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

State the law of conservation of momentum.

Question 6 Which one of the following is not the unit of energy? (a) joule (b) newton metre (c) kilowatt (d) kilowatt hour

If the force applied is F and the velocity gained is v, then the power developed is:

Why is a force needed to keep a block of wood inside water?

Name that part of ear which vibrates when outside sound falls on it.

Expiation of law's of motion

Define compressibility.

The distance of a galaxy from the earth is 5.6 × 1025 m. Assuming the speed of light to be 3 × 108 m S−1 find the time taken by light to travel this distance.

A body of mass 25kg has a momentum of 125kg m/s . Calculate velocity of the body.

I have not understood this definition of the Newton's Second Law of Motion: The rate of change of momentum is directly proportional to the applied force, in the direction of the motion. Please explain to me what is rate of change of momentum and please give examples

Under what condition, the average speed is equal to the magnitude of the average velocity.

Due to which property of a body ,it will tend to remain in the position of rest:

10 g of a gas at 2 atm pressure is cooled from 273o C to 273K. Keeping its volume constant. The pressure of the gas will be equal to ___ atm.

All the values and formulas from lesson gravitation

Why can't a clinical thermometer be used in a laboratory

A tennis ball of mass 0.11 kg travelling at 40 m per second hits a wall head on and bounces of returning along the same path at 30 M per second calculate the change in velocity of the ball as well as the change in momentum of that ball including the unit in your answer

A farmer moves along the boundary of a square field of side 10 metre in 40 sec. What will be the magnitude of displacement of the farmer at the end of 2 minutes in 20 sec.from his initial position?

Which of the following barometer can be used as an altimeter?

Two spring balances 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:

derive the equation for uniform accelerated motion for the displacement covered in its Nth second.(sn=u+a(n-1\2)

A stone is thrown vertically upwards with a velocity of 40 m/s. At what height will its kinetic energy and potential energy be equal?

While measuring the length of a rod with a vernier callipers, Fig. 1.14 below shows the position of its scales. What is the length of the rod ?

Why do astronauts grow taller in space?

What is a seconds' pendulum?

What will happento earth on the basis of gravitation if the sun dissapears

If A and B are two bodies of masses 20kg and 40kg respectively, then:

The 4kg head of a sledgehammer is moving at 6 m/s when strike a spike dividing into a log,the duration of impact is 2ms.find the time average of the impact force.

A man throws a ball weighing 200 g vertically upwards with a speed of 10m/s. Its momentum at the highest point of its flight will be:

A plastic mug full of water appears lighter inside water due to

How much energy does a 150 W steam iron consume per second?

In which of the following ways of charging is charge shared?

Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.

What is the maximum number of quantities you can imagine the time period of pendulum to depend upon?

What would be the relation between velocities of gun and bullet, if the mass of gun is more than the mass of bullet?

How are the following derived units related to the fundamental units ? (a) newton (b) watt (c) joule (d) pascal.

Carpet is beaten with a stick, dust will come out. Why does this happen?

The power output of an engine is 3 kW. How much work does the engine do in 20 s ?