6277 + Interview Questions in Physics Page 55 InterviewSolution

2701.	A mild steel torsion bar is used for measurement of a torque of 200 Nm. If the shear modulus of mild steel is 100 GN/m2 and 50 mm diameter then the angle of twist in (μ rad) is
Answer» A mild steel torsion bar is used for measurement of a torque of $200 N m$ . If the shear modulus of mild steel is $100 G N / m^{2}$ and $50 m m$ diameter then the angle of twist in $(μ r a d)$ is

Discussion

2702.	Should the rod of the electroscope connecting the disc with the strips be made of a conductor or an insulator? Why?
Answer» Should the rod of the electroscope connecting the disc with the strips be made of a conductor or an insulator? Why?

Discussion

2703.	What is the nature of image formed in: a. Concave lens b. Convex lens Also, give one use of each lens.[3 MARKS]
Answer» What is the nature of image formed in: a. Concave lens b. Convex lens Also, give one use of each lens.[3 MARKS]

Discussion

2704.	Question 1What determines the rate at which energy is delivered by a current?
Answer» Question 1 What determines the rate at which energy is delivered by a current?

Discussion

2705.	How many second make 3 minutes?
Answer» How many second make 3 minutes?

Discussion

2706.	A block of mass 10 kg is moving on a rough surface with velocity 4m/s in opposite direction of 20N force. Given coefficient of kinetic friction is (0.6 )Then find frictional force in block .
Answer» A block of mass 10 kg is moving on a rough surface with velocity 4m/s in opposite direction of 20N force. Given coefficient of kinetic friction is (0.6 )Then find frictional force in block .

Discussion

2707.	7.Derive an equation for self energy for an isolated charged conductor with radius R and charge Q
Answer» 7.Derive an equation for self energy for an isolated charged conductor with radius R and charge Q

Discussion

2708.	The gravitational potential energy stored in a box of weight 150 kgf is 1.5 ×104J. Find the height of the box. Take 1 kgf = 10 N.
Answer» The gravitational potential energy stored in a box of weight 150 kgf is 1.5 $\times 10^{4} J$ . Find the height of the box. Take 1 kgf = 10 N.

Discussion

2709.

sing following data, draw time – displacement graph for a moving object:Time (s)P246810121416Displacement (m)024446420Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Answer»

sing following data, draw time – displacement graph for a moving object:

Time (s)	P	2	4	6	8	10	12	14	16
Displacement (m)	0	2	4	4	4	6	4	2	0

Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Discussion

2710.	Should equal vectors always be parallel
Answer» Should equal vectors always be parallel

Discussion

2711.	What is the magnetic field on the perpendicular axis of rec†an gle of side a and b at a dis†an ce x from the centre.Current flowing is i.
Answer» What is the magnetic field on the perpendicular axis of rec†an gle of side a and b at a dis†an ce x from the centre.Current flowing is i.

Discussion

2712.	When the tension in a metal wire is T1, its length is l1. When the tension is T2, its length is l2. The natural length of wire is
Answer» When the tension in a metal wire is $T_{1}$ , its length is $l_{1}$ . When the tension is $T_{2}$ , its length is $l_{2}$ . The natural length of wire is

Discussion

2713.	12. Why air bubble inside the water behaves like a diverging lens
Answer» 12. Why air bubble inside the water behaves like a diverging lens

Discussion

2714.	A 2 C charge is moved in an electric Field of a fixed charge distribution from point A to B slowly. The work done by external agent in doing so is 180 J. What is the change in potential energy of the charge as utt moves from A to B?
Answer» A 2 C charge is moved in an electric Field of a fixed charge distribution from point A to B slowly. The work done by external agent in doing so is 180 J. What is the change in potential energy of the charge as utt moves from A to B?

Discussion

2715.	State Ohm’s law. [1 MARK]
Answer» State Ohm’s law. [1 MARK]

Discussion

2716.	Question 23A covered wooden box has the inner measures as 115 cm, 75 cm and 35 and thickness of wood as 2.5. cm. The volume of the wood is (a) 85000 cm3 (b) 80000 cm3(c) 82125 cm3 (d) 84000 cm3
Answer» Question 23 A covered wooden box has the inner measures as 115 cm, 75 cm and 35 and thickness of wood as 2.5. cm. The volume of the wood is (a) $85000 c m^{3}$ (b) $80000 c m^{3}$ (c) $82125 c m^{3}$ (d) $84000 c m^{3}$

2716.

Question 23A covered wooden box has the inner measures as 115 cm, 75 cm and 35 and thickness of wood as 2.5. cm. The volume of the wood is (a) 85000 cm3 (b) 80000 cm3(c) 82125 cm3 (d) 84000 cm3

Answer»

Question 23

A covered wooden box has the inner measures as 115 cm, 75 cm and 35 and thickness of wood as 2.5. cm. The volume of the wood is

(a) $85000 c m^{3}$ (b) $80000 c m^{3}$

(c) $82125 c m^{3}$ (d) $84000 c m^{3}$

Discussion

2717.	A dog weighing 25 kg is chasing a cat that jumps over a fence of height 1.6 m. What is the potential energy of the dog at the top of the fence? (Take g=10m/s2)
Answer» A dog weighing $25 k g$ is chasing a cat that jumps over a fence of height $1.6 m$ . What is the potential energy of the dog at the top of the fence? $($ Take $g = 10 m / s^{2})$

Discussion

2718.	LIQUID SOLUTIONS: The vapour pressure of a certain liquid is given by : log P = 3.54595 - 313.7/T + 1.40655log T, Where P is the vapour pressure in mm. T is Kelvin Temperature(log is of base 10) Determine the molar latent heat of vaporization as a function of temperature. Calculate its value at 80K.
Answer» LIQUID SOLUTIONS: The vapour pressure of a certain liquid is given by : log P = 3.54595 - 313.7/T + 1.40655log T, Where P is the vapour pressure in mm. T is Kelvin Temperature(log is of base 10) Determine the molar latent heat of vaporization as a function of temperature. Calculate its value at 80K.

Discussion

2719.	Concave mirror is
Answer» Concave mirror is

Discussion

2720.	What planning is required in advance to deal with the situation created by a cyclone? [5 MARKS]
Answer» What planning is required in advance to deal with the situation created by a cyclone? [5 MARKS]

Discussion

2721.	Earth revolves around Sun. As a result, the Sun appears to be in____________.
Answer» Earth revolves around Sun. As a result, the Sun appears to be in____________.

Discussion

2722.	Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Rani said it was the wrong way of measuring temperature. Do you agree with Rani? Explain your answer.
Answer» Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Rani said it was the wrong way of measuring temperature. Do you agree with Rani? Explain your answer.

Discussion

2723.	Give reason :butter is generally wrapped in wet cloths during summer, If no refrigerator is available. Explain
Answer» Give reason :butter is generally wrapped in wet cloths during summer, If no refrigerator is available. Explain

Discussion

2724.	Briefly explain how monsoon is formed in our country.
Answer» Briefly explain how monsoon is formed in our country.

Discussion

2725.	Which of the following best describes syrup?
Answer» Which of the following best describes syrup?

Discussion

2726.	An object starts at A, and travels at a speed of 40 kmph for 5 hours. It comes to rest at B. Another object starts at A and moves towards B, an hour after the first object has started.In order to reach the point B at the same time as the first object, with what speed must the second object travel?
Answer» An object starts at A, and travels at a speed of 40 kmph for 5 hours. It comes to rest at B. Another object starts at A and moves towards B, an hour after the first object has started. In order to reach the point B at the same time as the first object, with what speed must the second object travel?

Discussion

2727.	A pendulum has a time period of 1.5 s. So, it takes to complete 7 oscillations.
Answer» A pendulum has a time period of 1.5 s. So, it takes to complete 7 oscillations.

Discussion

2728.	What do you mean by heat transfer? How heat from the sun reaches earth?
Answer» What do you mean by heat transfer? How heat from the sun reaches earth?

Discussion

2729.	Himanshu has two lenses A and B. When he touches both the lenses he finds that A is thicker at the centre than the edges and B is thinner at the centre as compared to its edges. He has to focus sunlight on a particular point. Which of the following statement is true?
Answer» Himanshu has two lenses A and B. When he touches both the lenses he finds that A is thicker at the centre than the edges and B is thinner at the centre as compared to its edges. He has to focus sunlight on a particular point. Which of the following statement is true?

Discussion

2730.	Question 13 Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.
Answer» Question 13 Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.

Discussion

2731.	If the person can't see objects beyond 2cm,then what will be the focal length ( in case of myopia)
Answer» If the person can't see objects beyond 2cm,then what will be the focal length ( in case of myopia)

Discussion

2732.	What is atmospheric pressure? What causes it?
Answer» What is atmospheric pressure? What causes it?

Discussion

2733.	96.a train 500m long crosses a bridge of 1000m in 10 seconds. Find the average speed of the train when it just crosses the bridge.
Answer» 96.a train 500m long crosses a bridge of 1000m in 10 seconds. Find the average speed of the train when it just crosses the bridge.

Discussion

2734.	47.The density of material in C. G. S system of units is 4 g /cm3.In a system of units in which unit of length is 10 cm and unit of mass is 100 gms, the value of density of material will be
Answer» 47.The density of material in C. G. S system of units is 4 g /cm3.In a system of units in which unit of length is 10 cm and unit of mass is 100 gms, the value of density of material will be

Discussion

2735.	Question 5Give reasons:(a) School bells are made up of metals.(b) Electric wires are made up of copper.
Answer» Question 5 Give reasons: (a) School bells are made up of metals. (b) Electric wires are made up of copper.

2735.

Question 5Give reasons:(a) School bells are made up of metals.(b) Electric wires are made up of copper.

Answer»

Question 5

Give reasons:

(a) School bells are made up of metals.

(b) Electric wires are made up of copper.

Discussion

2736.	32.The molar heat capacity in a process of a diatomic gas if it does a work of Q/4 when a heat of Q I'd supplied to it is
Answer» 32.The molar heat capacity in a process of a diatomic gas if it does a work of Q/4 when a heat of Q I'd supplied to it is

Discussion

2737.	The distance vs time graph of a bus is given below. What is the speed of the bus at point A?
Answer» The distance vs time graph of a bus is given below. What is the speed of the bus at point A?

2737.

The distance vs time graph of a bus is given below. What is the speed of the bus at point A?

Answer»

The distance vs time graph of a bus is given below. What is the speed of the bus at point A?

Discussion

2738.	a car moves from A to B at the speed of 40 km h-1 and returns back on the same track at a speed of 60 km h-1 average velocity will be
Answer» a car moves from A to B at the speed of 40 km h-1 and returns back on the same track at a speed of 60 km h-1 average velocity will be

Discussion

2739.	Bottles are packets containing liquids have their volume marked in litre and millilitre, respectively.Give reason why?
Answer» Bottles are packets containing liquids have their volume marked in litre and millilitre, respectively.Give reason why?

Discussion

2740.	A 20 N object is released from a height of 10 m. Its kinetic energy just before hitting the ground is
Answer» A 20 N object is released from a height of 10 m. Its kinetic energy just before hitting the ground is

Discussion

2741.	What is the source of electricity in:01. Torch02. Calculator03. wrist watch
Answer» What is the source of electricity in: 01. Torch 02. Calculator 03. wrist watch

Discussion

2742.	103.On a long horizontal belt, a child runs to and fro with a speed of 9 km/h (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4 km/h. For an observer on the platform the speed of the child in the direction of motion of the belt is: 1. 9 km/h 2. 4 km/h 3. 13 km/h 4. 5 km/h
Answer» 103.On a long horizontal belt, a child runs to and fro with a speed of 9 km/h (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4 km/h. For an observer on the platform the speed of the child in the direction of motion of the belt is: 1. 9 km/h 2. 4 km/h 3. 13 km/h 4. 5 km/h

Discussion

2743.	An ant first travels from P to R on a right angled triangle PQR which is 13m long. Then it walks to point Q travelling 12m. Find the distance travelled by the ant.
Answer» An ant first travels from P to R on a right angled triangle PQR which is 13m long. Then it walks to point Q travelling 12m. Find the distance travelled by the ant.

2743.

An ant first travels from P to R on a right angled triangle PQR which is 13m long. Then it walks to point Q travelling 12m. Find the distance travelled by the ant.

Answer»

An ant first travels from P to R on a right angled triangle PQR which is 13m long. Then it walks to point Q travelling 12m. Find the distance travelled by the ant.

Discussion

2744.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

2745.	What is the difference between a tornado and a cyclone?
Answer» What is the difference between a tornado and a cyclone?

Discussion

2746.	a particle moves for 20s with speed 6m/s and then the speed 8m/s for another 20s and finally moves with speed 10m/s for next 20s what is the average speed of the particle?
Answer» a particle moves for 20s with speed 6m/s and then the speed 8m/s for another 20s and finally moves with speed 10m/s for next 20s what is the average speed of the particle?

Discussion

2747.	A heat engine works between suorce and sink temp 150 degree c and 30 degree c respectively. the efficiency
Answer» A heat engine works between suorce and sink temp 150 degree c and 30 degree c respectively. the efficiency

Discussion

2748.	A Vernier caliper has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier caliper, the least count is:
Answer» A Vernier caliper has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier caliper, the least count is:

Discussion

2749.	A particle traverse along a circular arc of radius 5m with constant speed of 2.5 m/s .What is the average acceleration over the one quarter circle?
Answer» A particle traverse along a circular arc of radius 5m with constant speed of 2.5 m/s .What is the average acceleration over the one quarter circle?

Discussion

2750.	The velocity of heat radiation in vacuum is
Answer» The velocity of heat radiation in vacuum is

Discussion

Explore topic-wise InterviewSolutions in .

A mild steel torsion bar is used for measurement of a torque of 200 Nm. If the shear modulus of mild steel is 100 GN/m2 and 50 mm diameter then the angle of twist in (μ rad) is

Should the rod of the electroscope connecting the disc with the strips be made of a conductor or an insulator? Why?

What is the nature of image formed in: a. Concave lens b. Convex lens Also, give one use of each lens.[3 MARKS]

Question 1What determines the rate at which energy is delivered by a current?

How many second make 3 minutes?

A block of mass 10 kg is moving on a rough surface with velocity 4m/s in opposite direction of 20N force. Given coefficient of kinetic friction is (0.6 )Then find frictional force in block .

7.Derive an equation for self energy for an isolated charged conductor with radius R and charge Q

The gravitational potential energy stored in a box of weight 150 kgf is 1.5 ×104J. Find the height of the box. Take 1 kgf = 10 N.

sing following data, draw time – displacement graph for a moving object:Time (s)P246810121416Displacement (m)024446420Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Should equal vectors always be parallel

What is the magnetic field on the perpendicular axis of rec†an gle of side a and b at a dis†an ce x from the centre.Current flowing is i.

When the tension in a metal wire is T1, its length is l1. When the tension is T2, its length is l2. The natural length of wire is

12. Why air bubble inside the water behaves like a diverging lens

A 2 C charge is moved in an electric Field of a fixed charge distribution from point A to B slowly. The work done by external agent in doing so is 180 J. What is the change in potential energy of the charge as utt moves from A to B?

State Ohm’s law. [1 MARK]

Question 23A covered wooden box has the inner measures as 115 cm, 75 cm and 35 and thickness of wood as 2.5. cm. The volume of the wood is (a) 85000 cm3 (b) 80000 cm3(c) 82125 cm3 (d) 84000 cm3

A dog weighing 25 kg is chasing a cat that jumps over a fence of height 1.6 m. What is the potential energy of the dog at the top of the fence? (Take g=10m/s2)

Concave mirror is

What planning is required in advance to deal with the situation created by a cyclone? [5 MARKS]

Earth revolves around Sun. As a result, the Sun appears to be in____________.

Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Rani said it was the wrong way of measuring temperature. Do you agree with Rani? Explain your answer.

Give reason :butter is generally wrapped in wet cloths during summer, If no refrigerator is available. Explain

Briefly explain how monsoon is formed in our country.

Which of the following best describes syrup?

An object starts at A, and travels at a speed of 40 kmph for 5 hours. It comes to rest at B. Another object starts at A and moves towards B, an hour after the first object has started.In order to reach the point B at the same time as the first object, with what speed must the second object travel?

A pendulum has a time period of 1.5 s. So, it takes to complete 7 oscillations.

What do you mean by heat transfer? How heat from the sun reaches earth?

Himanshu has two lenses A and B. When he touches both the lenses he finds that A is thicker at the centre than the edges and B is thinner at the centre as compared to its edges. He has to focus sunlight on a particular point. Which of the following statement is true?

Question 13 Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.

If the person can't see objects beyond 2cm,then what will be the focal length ( in case of myopia)

What is atmospheric pressure? What causes it?

96.a train 500m long crosses a bridge of 1000m in 10 seconds. Find the average speed of the train when it just crosses the bridge.

47.The density of material in C. G. S system of units is 4 g /cm3.In a system of units in which unit of length is 10 cm and unit of mass is 100 gms, the value of density of material will be

Question 5Give reasons:(a) School bells are made up of metals.(b) Electric wires are made up of copper.

32.The molar heat capacity in a process of a diatomic gas if it does a work of Q/4 when a heat of Q I'd supplied to it is

The distance vs time graph of a bus is given below. What is the speed of the bus at point A?

a car moves from A to B at the speed of 40 km h-1 and returns back on the same track at a speed of 60 km h-1 average velocity will be

Bottles are packets containing liquids have their volume marked in litre and millilitre, respectively.Give reason why?

A 20 N object is released from a height of 10 m. Its kinetic energy just before hitting the ground is

What is the source of electricity in:01. Torch02. Calculator03. wrist watch

An ant first travels from P to R on a right angled triangle PQR which is 13m long. Then it walks to point Q travelling 12m. Find the distance travelled by the ant.

Which of the following statements is correct?

What is the difference between a tornado and a cyclone?

a particle moves for 20s with speed 6m/s and then the speed 8m/s for another 20s and finally moves with speed 10m/s for next 20s what is the average speed of the particle?

A heat engine works between suorce and sink temp 150 degree c and 30 degree c respectively. the efficiency

A Vernier caliper has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier caliper, the least count is:

A particle traverse along a circular arc of radius 5m with constant speed of 2.5 m/s .What is the average acceleration over the one quarter circle?

The velocity of heat radiation in vacuum is