6277 + Interview Questions in Physics Page 20 InterviewSolution

951.	What are the factors on which work depends?
Answer» What are the factors on which work depends?

Discussion

952.	How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?
Answer» How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?

Discussion

953.	Suppose there is an object around which light could bend, like water flowing around a stone in its path. Would such an object form a shadow? Justify your answer.
Answer» Suppose there is an object around which light could bend, like water flowing around a stone in its path. Would such an object form a shadow? Justify your answer.

Discussion

954.	Question 19Identical packets are dropped from two aeroplanes, one above the equator and the other above the north pole, both at height h. Assuming all conditions are identical, will those packets take same time to reach the surface of earth. Justify your answer.
Answer» Question 19 Identical packets are dropped from two aeroplanes, one above the equator and the other above the north pole, both at height h. Assuming all conditions are identical, will those packets take same time to reach the surface of earth. Justify your answer.

Discussion

955.	How does a man’s voice differ from a woman’s voice?
Answer» How does a man’s voice differ from a woman’s voice?

Discussion

956.	Sushweta has to send a laser signal to Garima. But she finds out that the signal misses Garima by 40. She asks Himanshu to rotate the mirror.By what angle should Himanshu rotate the mirror so that the signal reaches to Garima? (Himanshu is standing in front of Sushweta and Garima and both of them are on the right and left side of Himanshu respectively )
Answer» Sushweta has to send a laser signal to Garima. But she finds out that the signal misses Garima by $4^{0}$ . She asks Himanshu to rotate the mirror. By what angle should Himanshu rotate the mirror so that the signal reaches to Garima? (Himanshu is standing in front of Sushweta and Garima and both of them are on the right and left side of Himanshu respectively )

956.

Sushweta has to send a laser signal to Garima. But she finds out that the signal misses Garima by 40. She asks Himanshu to rotate the mirror.By what angle should Himanshu rotate the mirror so that the signal reaches to Garima? (Himanshu is standing in front of Sushweta and Garima and both of them are on the right and left side of Himanshu respectively )

Answer»

Sushweta has to send a laser signal to Garima. But she finds out that the signal misses Garima by $4^{0}$ . She asks Himanshu to rotate the mirror.

By what angle should Himanshu rotate the mirror so that the signal reaches to Garima? (Himanshu is standing in front of Sushweta and Garima and both of them are on the right and left side of Himanshu respectively )

Discussion

957.	53.What is an Electrolyte?
Answer» 53.What is an Electrolyte?

Discussion

958.	Differentiate between periodic and non-periodic motions by giving an example of each.
Answer» Differentiate between periodic and non-periodic motions by giving an example of each.

Discussion

959.	Question 3 (c) Fill in the blanks : (c) Temperature is measured in degree ___.
Answer» Question 3 (c) Fill in the blanks : (c) Temperature is measured in degree ___.

Discussion

960.	An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Answer» An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.

Discussion

961.	Consider the frame shown belowIf then distribution factor for member BC is ____IAB:IBC:ICD=1:2:1 0.765
Answer» Consider the frame shown below If then distribution factor for member BC is ____ $I_{A B} : I_{B C} : I_{C D} = 1 : 2 : 1$ 0.765

Discussion

962.	A wooden spoon is dipped in a cup of icecream.Its other end
Answer» A wooden spoon is dipped in a cup of icecream.Its other end

Discussion

963.	An object is dropped from a height h from the ground .every time it hits the ground it loses 50percent of its kinetic energy.the total distance covered is
Answer» An object is dropped from a height h from the ground .every time it hits the ground it loses 50percent of its kinetic energy.the total distance covered is

Discussion

964.	What do you like to do when it rains? (stay in/go out) Do you like puddles? The other seasons in India are hot and cold. Describe in your language which season you like the best. Now can you say this in English?Trace along the dots.Disclaimer: Kindly refer the textbook for the images.
Answer» What do you like to do when it rains? (stay in/go out) Do you like puddles? The other seasons in India are hot and cold. Describe in your language which season you like the best. Now can you say this in English? Trace along the dots. Disclaimer: Kindly refer the textbook for the images.

Discussion

965.	A train travels 40 km at a uniform speed of 30kmh−1. Its average speed for the whole journey after travelling another 40 km is 45kmh−1. Its speed in the second half of the journey is ____.
Answer» A train travels 40 km at a uniform speed of $30 k m h^{- 1}$ . Its average speed for the whole journey after travelling another 40 km is $45 k m h^{- 1}$ . Its speed in the second half of the journey is ____.

Discussion

966.	When a coil of copper is kept at a certain distance above a flame, the candle keeps burning, but when the coil is placed over the flame, it is extinguished. This happens because
Answer» When a coil of copper is kept at a certain distance above a flame, the candle keeps burning, but when the coil is placed over the flame, it is extinguished. This happens because

Discussion

967.	Which of the following is necessary for the formation of a shadow?
Answer» Which of the following is necessary for the formation of a shadow?

Discussion

968.	One light year, a unit of length, is equal to how many kilometers? (approximate)
Answer» One light year, a unit of length, is equal to how many kilometers? (approximate)

Discussion

969.	Question 16An object of mass, m is moving with a constant velocity, v. how much work should be done on the object in order to bring the object to rest?
Answer» Question 16 An object of mass, m is moving with a constant velocity, v. how much work should be done on the object in order to bring the object to rest?

Discussion

970.	What kind of wire will you use for the following–one offering low resistance or one offering high resistance?a. connecting wireb. filament of a bulb
Answer» What kind of wire will you use for the following–one offering low resistance or one offering high resistance? a. connecting wire b. filament of a bulb

Discussion

971.	44.the spring constant of two spring are k and k' respectively Spring are stretch up to the limit when potential energy of both becomes equal the ratio of applied force( F1 and F2 )on them will be
Answer» 44.the spring constant of two spring are k and k' respectively Spring are stretch up to the limit when potential energy of both becomes equal the ratio of applied force( F1 and F2 )on them will be

Discussion

972.	Reflection of the point (−10,7) on the x-axis is ____________
Answer» Reflection of the point $(- 10, 7)$ on the x-axis is ____________

Discussion

973.	At normal temperature and pressure density of a air is 1.293 kg m^-3 and specific heat at constant volume is 169 cal kg^-1 K^-1 find the value of specific heat at constant pressure
Answer» At normal temperature and pressure density of a air is 1.293 kg m^-3 and specific heat at constant volume is 169 cal kg^-1 K^-1 find the value of specific heat at constant pressure

Discussion

974.	Explain briefly:What is the difference between magnitude and direction in displacement?
Answer» Explain briefly: What is the difference between magnitude and direction in displacement?

Discussion

975.	A box follows a zigzag path to reach from point A to B. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box, then the work done on the box by the force is:
Answer» A box follows a zigzag path to reach from point A to B. The actual length of the path is $5 m$ and the length of the straight line joining the two points is $2 m$ . If a force of $5 N$ acts on the box, then the work done on the box by the force is:

Discussion

976.	Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from 2 ms−1 to 5 ms−1? (Ignore air resistance and friction).[5 MARKS]
Answer» Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from $2 m s^{- 1}$ to $5 m s^{- 1}$ ? (Ignore air resistance and friction). [5 MARKS]

Discussion

977.	Question 12The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.
Answer» Question 12 The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Discussion

978.	Two non-mixing liquids of densities and nρ (n>1) are put in a container The height of each liquid is h. Asolid cylinder of length L and density d is put in this container. The cylinder floats withaxis vertical and length pl (p < 1) in the denserliquid. The density d is equal to
Answer» Two non-mixing liquids of densities and nρ (n>1) are put in a container The height of each liquid is h. Asolid cylinder of length L and density d is put in this container. The cylinder floats withaxis vertical and length pl (p < 1) in the denserliquid. The density d is equal to

Discussion

979.	Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?
Answer» Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?

Discussion

980.	the s†an dard enthalpy of formation of gaseous H2O at 298K is -241.82KJ/mol. Estimatr its value of 373K given the following values of the molar heat capacities at cons†an t pressure: H2O(g):35.58J/Kmol, H2(g):28.84J/mol K and O2(g):29.37J/mol K. assume heat capacity to be independent of temperature. 1) -272.6Kj/mol 2) -300Kj/mol 3) -242.6Kj/mol 4) -206kj/
Answer» the s†an dard enthalpy of formation of gaseous H2O at 298K is -241.82KJ/mol. Estimatr its value of 373K given the following values of the molar heat capacities at cons†an t pressure: H2O(g):35.58J/Kmol, H2(g):28.84J/mol K and O2(g):29.37J/mol K. assume heat capacity to be independent of temperature. 1) -272.6Kj/mol 2) -300Kj/mol 3) -242.6Kj/mol 4) -206kj/

Discussion

981.	Question 18 (e)Explain:(e) Why are copper and aluminum wires usually employed for electricity transmission?
Answer» Question 18 (e) Explain: (e) Why are copper and aluminum wires usually employed for electricity transmission?

Discussion

982.	38. Assuming Earth as a sphere of radius R, the weight of mass 1 kg at a distance 2R from the centre of Earth is 2.5N.The weight of same mass at a distance 3R will be.
Answer» 38. Assuming Earth as a sphere of radius R, the weight of mass 1 kg at a distance 2R from the centre of Earth is 2.5N.The weight of same mass at a distance 3R will be.

Discussion

983.	A battery of emf E and internal resistance r is connected across a resistance R. Resistance R can be adjusted to any value greater than or equal to zero. A graph is plotted between the current passing through the resistance (I) and potential difference across the termainals of the battery (V). Maximum power developed across the resistance R is
Answer» A battery of emf $E$ and internal resistance $r$ is connected across a resistance $R$ . Resistance $R$ can be adjusted to any value greater than or equal to zero. A graph is plotted between the current passing through the resistance $(I)$ and potential difference across the termainals of the battery $(V)$ . Maximum power developed across the resistance $R$ is

Discussion

984.	The lower portion of clouds are negatively charged, what effect would it have on the Earth?
Answer» The lower portion of clouds are negatively charged, what effect would it have on the Earth?

Discussion

985.	Which of these is not a unit of speed?
Answer» Which of these is not a unit of speed?

Discussion

986.	Write answers the following questions. (a) Why is a medium necessary for conduction? (b) Why are the upper layers of water in a pond warmer? (c) Why does it feel warm near a bonfire? (d) Which mode of heat transfer is thwarted by the shiny surfaces in a thermos flask?
Answer» Write answers the following questions. (a) Why is a medium necessary for conduction? (b) Why are the upper layers of water in a pond warmer? (c) Why does it feel warm near a bonfire? (d) Which mode of heat transfer is thwarted by the shiny surfaces in a thermos flask?

986.

Write answers the following questions. (a) Why is a medium necessary for conduction? (b) Why are the upper layers of water in a pond warmer? (c) Why does it feel warm near a bonfire? (d) Which mode of heat transfer is thwarted by the shiny surfaces in a thermos flask?

Answer»

Write answers the following questions.

(a) Why is a medium necessary for conduction?

(b) Why are the upper layers of water in a pond warmer?

(c) Why does it feel warm near a bonfire?

(d) Which mode of heat transfer is thwarted by the shiny surfaces in a thermos flask?

Discussion

987.	The driver of a car traveling at 36 km/h applies the brake to decelerate uniformly. The car stops in 10 sec. Plot the speed-time graph for this period. find the distance traveled by car during this period by calculating the area under the graph.
Answer» The driver of a car traveling at 36 km/h applies the brake to decelerate uniformly. The car stops in 10 sec. Plot the speed-time graph for this period. find the distance traveled by car during this period by calculating the area under the graph.

Discussion

988.	32. Isothermal compressibility (K) of a gas is defined as
Answer» 32. Isothermal compressibility (K) of a gas is defined as

Discussion

989.	A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?
Answer» A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?

Discussion

990.	two electric bupbs whose resis†an ces in ratio 1:2 are connected in series to wa cons†an t voltage source .the p9wer sdissipates in them are in ratois
Answer» two electric bupbs whose resis†an ces in ratio 1:2 are connected in series to wa cons†an t voltage source .the p9wer sdissipates in them are in ratois

Discussion

991.	Mercury thermometers are increasingly being replaced by digital thermometers. Which of the following is/are a correct reason for this?
Answer» Mercury thermometers are increasingly being replaced by digital thermometers. Which of the following is/are a correct reason for this?

Discussion

992.	what is spring potential energy?
Answer» what is spring potential energy?

Discussion

993.	A bulb of 100 watt & an electric iron of 730 W are used for 2 hours daily . What is the total energy consumed in 10 days.
Answer» A bulb of 100 watt & an electric iron of 730 W are used for 2 hours daily . What is the total energy consumed in 10 days.

Discussion

994.	An next travels 16 meters in 4 second and another 16 meters in 2 seconds. Find the average speed.
Answer» An next travels 16 meters in 4 second and another 16 meters in 2 seconds. Find the average speed.

Discussion

995.	A long, straight, solid metal wire of radius 2 mmcarries a current uniformly distributed over itscircular cross-section. The magnetic field ofinduction at a distance 2 mm from its axis is B.Then the magnetic field induction at distance1 mm from axis will beb) B/2d) Bc) 2B
Answer» A long, straight, solid metal wire of radius 2 mmcarries a current uniformly distributed over itscircular cross-section. The magnetic field ofinduction at a distance 2 mm from its axis is B.Then the magnetic field induction at distance1 mm from axis will beb) B/2d) Bc) 2B

Discussion

996.	A person walks along the sides of a square field.each side is 100 m long what is the maximum magnitude of displacement of the person in any time interval?
Answer» A person walks along the sides of a square field.each side is 100 m long what is the maximum magnitude of displacement of the person in any time interval?

Discussion

997.	Describe an activity along with a labelled diagram the phenomenon o dispersion through prism .mention steps nd draw diagram
Answer» Describe an activity along with a labelled diagram the phenomenon o dispersion through prism .mention steps nd draw diagram

Discussion

998.	K1, K2, K3 are equilibrium constants for following reactionsX + 2 Y ⇌ Z; K1Z + P ⇌ 3 X; K26 Y + P ⇌ 2 Z; K3Then which is correct relation?
Answer» K1, K2, K3 are equilibrium constants for following reactions X + 2 Y ⇌ Z; K1 Z + P ⇌ 3 X; K2 6 Y + P ⇌ 2 Z; K3 Then which is correct relation?

Discussion

999.	Question 17 Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
Answer» Question 17 Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.

999.

Question 17 Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.

Answer»

Question 17

Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.

Discussion

1000.	Why is the mirror image of AMBULANCE written on the ambulance? [2 MARKS]
Answer» Why is the mirror image of AMBULANCE written on the ambulance? [2 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

What are the factors on which work depends?

How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?

Suppose there is an object around which light could bend, like water flowing around a stone in its path. Would such an object form a shadow? Justify your answer.

Question 19Identical packets are dropped from two aeroplanes, one above the equator and the other above the north pole, both at height h. Assuming all conditions are identical, will those packets take same time to reach the surface of earth. Justify your answer.

How does a man’s voice differ from a woman’s voice?

53.What is an Electrolyte?

Differentiate between periodic and non-periodic motions by giving an example of each.

Question 3 (c) Fill in the blanks : (c) Temperature is measured in degree ___.

An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.

Consider the frame shown belowIf then distribution factor for member BC is ____IAB:IBC:ICD=1:2:1 0.765

A wooden spoon is dipped in a cup of icecream.Its other end

An object is dropped from a height h from the ground .every time it hits the ground it loses 50percent of its kinetic energy.the total distance covered is

What do you like to do when it rains? (stay in/go out) Do you like puddles? The other seasons in India are hot and cold. Describe in your language which season you like the best. Now can you say this in English?Trace along the dots.Disclaimer: Kindly refer the textbook for the images.

A train travels 40 km at a uniform speed of 30kmh−1. Its average speed for the whole journey after travelling another 40 km is 45kmh−1. Its speed in the second half of the journey is ____.

When a coil of copper is kept at a certain distance above a flame, the candle keeps burning, but when the coil is placed over the flame, it is extinguished. This happens because

Which of the following is necessary for the formation of a shadow?

One light year, a unit of length, is equal to how many kilometers? (approximate)

Question 16An object of mass, m is moving with a constant velocity, v. how much work should be done on the object in order to bring the object to rest?

What kind of wire will you use for the following–one offering low resistance or one offering high resistance?a. connecting wireb. filament of a bulb

44.the spring constant of two spring are k and k' respectively Spring are stretch up to the limit when potential energy of both becomes equal the ratio of applied force( F1 and F2 )on them will be

Reflection of the point (−10,7) on the x-axis is ____________

At normal temperature and pressure density of a air is 1.293 kg m^-3 and specific heat at constant volume is 169 cal kg^-1 K^-1 find the value of specific heat at constant pressure

Explain briefly:What is the difference between magnitude and direction in displacement?

A box follows a zigzag path to reach from point A to B. The actual length of the path is 5 m and the length of the straight line joining the two points is 2 m. If a force of 5 N acts on the box, then the work done on the box by the force is:

Define energy. Mention two types of energy. How much work should be done on a bicycle of mass 20 kg to increase its speed from 2 ms−1 to 5 ms−1? (Ignore air resistance and friction).[5 MARKS]

Question 12The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Two non-mixing liquids of densities and nρ (n>1) are put in a container The height of each liquid is h. Asolid cylinder of length L and density d is put in this container. The cylinder floats withaxis vertical and length pl (p < 1) in the denserliquid. The density d is equal to

Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?

Question 18 (e)Explain:(e) Why are copper and aluminum wires usually employed for electricity transmission?

38. Assuming Earth as a sphere of radius R, the weight of mass 1 kg at a distance 2R from the centre of Earth is 2.5N.The weight of same mass at a distance 3R will be.

The lower portion of clouds are negatively charged, what effect would it have on the Earth?

Which of these is not a unit of speed?

Write answers the following questions. (a) Why is a medium necessary for conduction? (b) Why are the upper layers of water in a pond warmer? (c) Why does it feel warm near a bonfire? (d) Which mode of heat transfer is thwarted by the shiny surfaces in a thermos flask?

The driver of a car traveling at 36 km/h applies the brake to decelerate uniformly. The car stops in 10 sec. Plot the speed-time graph for this period. find the distance traveled by car during this period by calculating the area under the graph.

32. Isothermal compressibility (K) of a gas is defined as

A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ball and the ball on the boy respectively at the time of compressing?

two electric bupbs whose resis†an ces in ratio 1:2 are connected in series to wa cons†an t voltage source .the p9wer sdissipates in them are in ratois

Mercury thermometers are increasingly being replaced by digital thermometers. Which of the following is/are a correct reason for this?

what is spring potential energy?

A bulb of 100 watt & an electric iron of 730 W are used for 2 hours daily . What is the total energy consumed in 10 days.

An next travels 16 meters in 4 second and another 16 meters in 2 seconds. Find the average speed.

A long, straight, solid metal wire of radius 2 mmcarries a current uniformly distributed over itscircular cross-section. The magnetic field ofinduction at a distance 2 mm from its axis is B.Then the magnetic field induction at distance1 mm from axis will beb) B/2d) Bc) 2B

A person walks along the sides of a square field.each side is 100 m long what is the maximum magnitude of displacement of the person in any time interval?

Describe an activity along with a labelled diagram the phenomenon o dispersion through prism .mention steps nd draw diagram

K1, K2, K3 are equilibrium constants for following reactionsX + 2 Y ⇌ Z; K1Z + P ⇌ 3 X; K26 Y + P ⇌ 2 Z; K3Then which is correct relation?

Question 17 Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.

Why is the mirror image of AMBULANCE written on the ambulance? [2 MARKS]