3752 + Interview Questions in Physics Page 5 InterviewSolution

201.	The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is 0.5mm and there are 50 divisions on the circular scale. The reading on the main scale is 2.5mm and that on the circular scale is 20 divisions. If the measured mass of the ball has a relative error of 2%, the relative percentage error in the density is 1) 0.9% 2) 2.4% 3) 3.1% 4) 4.2%
Answer» The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is 0.5mm and there are 50 divisions on the circular scale. The reading on the main scale is 2.5mm and that on the circular scale is 20 divisions. If the measured mass of the ball has a relative error of 2%, the relative percentage error in the density is 1) 0.9% 2) 2.4% 3) 3.1% 4) 4.2%

Discussion

202.	A car moves from x to y with a uniform speed v and returns to y with a uniform speed u. The average speed for this round trip is?
Answer» A car moves from x to y with a uniform speed v and returns to y with a uniform speed u. The average speed for this round trip is?

Discussion

203.	two block system one over the other moves with cons†an t velocity 10m/s towars right all surfaces in contact are rough the frictional force applied by lower block on upper block is:
Answer» two block system one over the other moves with cons†an t velocity 10m/s towars right all surfaces in contact are rough the frictional force applied by lower block on upper block is:

Discussion

204.	What are star maps and what are they used for?
Answer» What are star maps and what are they used for?

Discussion

205.	This type of scissor is used as a:
Answer» This type of scissor is used as a:

205.

This type of scissor is used as a:

Answer»

This type of scissor is used as a:

Discussion

206.	On moving down the group 15 , the density increases how?
Answer» On moving down the group 15 , the density increases how?

Discussion

207.	Question 2: What are the properties of solid? Name all the three states of water.
Answer» Question 2: What are the properties of solid? Name all the three states of water.

207.

Question 2: What are the properties of solid? Name all the three states of water.

Answer»

Question 2:

What are the properties of solid?

Name all the three states of water.

Discussion

208.	Time period of a simple pendulum is T. Time taken by it to complete 3/8 oscillations starting from mean position is(1) 3T/12(2) 3T/8(3) 7T/12(4) 5T/12
Answer» Time period of a simple pendulum is T. Time taken by it to complete 3/8 oscillations starting from mean position is (1) 3T/12 (2) 3T/8 (3) 7T/12 (4) 5T/12

Discussion

209.	116.When a horse pulls a cart, what is the reverse force? Why does'nt the cart go backwords??
Answer» 116.When a horse pulls a cart, what is the reverse force? Why does'nt the cart go backwords??

Discussion

210.	The number of teeth in the crank wheel and free wheel of a bicycle, connected by a chain are 48 and respectively. Their diameters are 20cm and 10 cm respectively. The radius of the rear wheel to which the free wheel is fixed coaxially is 10 times that of the free wheel. If a cyclist pedals the bicycle at two rotations per second, find the speed of the cyclist.
Answer» The number of teeth in the crank wheel and free wheel of a bicycle, connected by a chain are 48 and respectively. Their diameters are 20cm and 10 cm respectively. The radius of the rear wheel to which the free wheel is fixed coaxially is 10 times that of the free wheel. If a cyclist pedals the bicycle at two rotations per second, find the speed of the cyclist.

Discussion

211.	When 2 wires are at same potential will short circuit occur when they touch each other?
Answer» When 2 wires are at same potential will short circuit occur when they touch each other?

Discussion

212.	Suggest three measures to limit noise pollution in your locality.
Answer» Suggest three measures to limit noise pollution in your locality.

Discussion

213.	What is an image?
Answer» What is an image?

Discussion

214.	Calculate the mechanical advantage of a lever in which the effort arm is 50 cm and the load arm is 2 cm. ___
Answer» Calculate the mechanical advantage of a lever in which the effort arm is 50 cm and the load arm is 2 cm. ___

214.

Calculate the mechanical advantage of a lever in which the effort arm is 50 cm and the load arm is 2 cm. ___

Answer»

Calculate the mechanical advantage of a lever in which the effort arm is 50 cm and the load arm is 2 cm.

___

Discussion

215.	What is the area of a rectangle having length 6 cm and breadth 4 cm ?
Answer» What is the area of a rectangle having length 6 cm and breadth 4 cm ?

Discussion

216.	what is friction
Answer» what is friction

Discussion

217.	v × mv is equal to 0 how
Answer» v × mv is equal to 0 how

Discussion

218.	How can Srishti makes a polygon using 1) 5 Sticks of equal length. 2) 3 Sticks of equal length.
Answer» How can Srishti makes a polygon using 1) 5 Sticks of equal length. 2) 3 Sticks of equal length.

218.

How can Srishti makes a polygon using 1) 5 Sticks of equal length. 2) 3 Sticks of equal length.

Answer»

How can Srishti makes a polygon using

1) 5 Sticks of equal length.

2) 3 Sticks of equal length.

Discussion

219.	what are natural magnets ? what is the difference between normal and natural magnet ?
Answer» what are natural magnets ? what is the difference between normal and natural magnet ?

Discussion

220.	Harish ran a certain distance faster than Suresh. Which fundamental physical quantity/quantities is/are measured for comparing their speeds?
Answer» Harish ran a certain distance faster than Suresh. Which fundamental physical quantity/quantities is/are measured for comparing their speeds?

Discussion

221.	Name the two windows of the ear and explain their respective functions.
Answer» Name the two windows of the ear and explain their respective functions.

Discussion

222.	A body is kept at rest on a horizontal plane. After giving it a short push, it travels for some distance and finally comes to rest. Which of the following forces is responsible for stopping the body?
Answer» A body is kept at rest on a horizontal plane. After giving it a short push, it travels for some distance and finally comes to rest. Which of the following forces is responsible for stopping the body?

Discussion

223.	what is angle of contact and stokes law?
Answer» what is angle of contact and stokes law?

Discussion

224.	Mechanical advantage (M. A), load (L) and effort (E) are related as : (a) M.A = L × E (b) M.A. × E = L (c) E= M.A. × L (d) none of these.
Answer» Mechanical advantage (M. A), load (L) and effort (E) are related as : (a) M.A = L $\times$ E (b) M.A. $\times$ E = L (c) E= M.A. $\times$ L (d) none of these.

224.

Mechanical advantage (M. A), load (L) and effort (E) are related as : (a) M.A = L × E (b) M.A. × E = L (c) E= M.A. × L (d) none of these.

Answer»

Mechanical advantage (M. A), load (L) and effort (E) are related as :

(a) M.A = L $\times$ E (b) M.A. $\times$ E = L

(c) E= M.A. $\times$ L (d) none of these.

Discussion

225.	A fluid friction is a __ offered by a fluid against its flow.
Answer» A fluid friction is a __ offered by a fluid against its flow.

Discussion

226.	A block of mass 15 kg is resting on a rough inclined plane as shown in figure. The blocks tied up by a horizontal string which has a tension of S0N. The coefficient of frictionbetween the surface is
Answer» A block of mass 15 kg is resting on a rough inclined plane as shown in figure. The blocks tied up by a horizontal string which has a tension of S0N. The coefficient of frictionbetween the surface is

Discussion

227.	Calclate the work done in pulling an object with a constant force F as shown in figure, so that the blockmoves with a constant velocity through a distance 'd'. (given that the ground is rough with coefficientfriction μ )
Answer» Calclate the work done in pulling an object with a constant force F as shown in figure, so that the blockmoves with a constant velocity through a distance 'd'. (given that the ground is rough with coefficientfriction μ )

Discussion

228.	Harshit is sitting inside a stationary bus. Which of the following objects will appear to be moving with respect to him?
Answer» Harshit is sitting inside a stationary bus. Which of the following objects will appear to be moving with respect to him?

Discussion

229.	Which of the following are reasons why a rod cannot be used as a standard for measuring length?
Answer» Which of the following are reasons why a rod cannot be used as a standard for measuring length?

Discussion

230.	There are cups in 6 quarts.
Answer» $There are$ $cups in 6 quarts.$

Discussion

231.	A conveyer belt is moving at a cons†an t speed of 2 m/s.A box is gently dropped them is μ=0.5 .The dis†an ce that the box will move relative to belt before coming to rest on it, taking g=10 m/s^{
Answer» A conveyer belt is moving at a cons†an t speed of 2 m/s.A box is gently dropped them is μ=0.5 .The dis†an ce that the box will move relative to belt before coming to rest on it, taking g=10 m/s^{

Discussion

232.	11A wire of resistance 72 Q is bent in the form of anequilateral triangle. The resistance between twovertices is(1) 8 Ω(2) 16 Ω(3) 32Ω(4) 22 Ω
Answer» 11A wire of resistance 72 Q is bent in the form of anequilateral triangle. The resistance between twovertices is(1) 8 Ω(2) 16 Ω(3) 32Ω(4) 22 Ω

Discussion

233.	Question 4 In the following arrangement shown in Fig., the bulb will not glow if the ends A and B are connected with (a) A steel spoon (b) A metal clip (c) A plastic clip (d) A copper wire
Answer» Question 4 In the following arrangement shown in Fig., the bulb will not glow if the ends A and B are connected with (a) A steel spoon (b) A metal clip (c) A plastic clip (d) A copper wire

233.

Question 4 In the following arrangement shown in Fig., the bulb will not glow if the ends A and B are connected with (a) A steel spoon (b) A metal clip (c) A plastic clip (d) A copper wire

Answer»

Question 4

In the following arrangement shown in Fig., the bulb will not glow if the ends A and B are connected with

(a) A steel spoon

(b) A metal clip

(c) A plastic clip

(d) A copper wire

Discussion

234.	Why does sound come when a balloon burst open ??
Answer» Why does sound come when a balloon burst open ??

Discussion

235.	List any four properties of a magnet.
Answer» List any four properties of a magnet.

Discussion

236.	The tail of a comet points :
Answer» The tail of a comet points :

Discussion

237.	The length of the path travelled by a body is known as __________.
Answer» The length of the path travelled by a body is known as __________.

Discussion

238.	Is light necessary to see objects?
Answer» Is light necessary to see objects?

Discussion

239.	A machine has a mechanical advantage of 10. It used to lift a load of 200 kgf. Find the required effort.
Answer» A machine has a mechanical advantage of $10$ . It used to lift a load of $200 k g f$ . Find the required effort.

Discussion

240.	Draw an electric circuit in which a cell is used to light a bulb, using components b, c and d of Question 1. Mark the direction of current in the circuit.
Answer» Draw an electric circuit in which a cell is used to light a bulb, using components b, c and d of Question 1. Mark the direction of current in the circuit.

Discussion

241.	In which direction does friction act, when a block is moved up the inclined plane?
Answer» In which direction does friction act, when a block is moved up the inclined plane?

Discussion

242.	what is units
Answer» what is units

Discussion

243.	To make accurate measurements there are two main requirements. What are they?
Answer» To make accurate measurements there are two main requirements. What are they?

Discussion

244.	A student performs experiment with simple pendulum and measures time for 10 vibration.if he measures a time for 100 vibrations,the relative error in the measurement of time period will be reduced by
Answer» A student performs experiment with simple pendulum and measures time for 10 vibration.if he measures a time for 100 vibrations,the relative error in the measurement of time period will be reduced by

Discussion

245.	The volume of the cube is 27 cm3. If this cube is cut into 9 smaller cubes then, what's the volume of each smaller cube?
Answer» The volume of the cube is $27 c m^{3}$ . If this cube is cut into 9 smaller cubes then, what's the volume of each smaller cube?

Discussion

246.	___ objects emit light by itself.
Answer» ___ objects emit light by itself.

Discussion

247.	The commercial unit of power is kWh, which is equal to:
Answer» The commercial unit of power is kWh, which is equal to:

Discussion

248.	When is an object said to be in motion?
Answer» When is an object said to be in motion?

Discussion

249.	Fast oscillations are called ___.
Answer» Fast oscillations are called ___.

Discussion

250.	Which of the following is/are non-contact force(s)? 1. Gravitational Force 2. Electrostatic Force 3. Muscular Force 4. Magnetic Force
Answer» Which of the following is/are non-contact force(s)? 1. Gravitational Force 2. Electrostatic Force 3. Muscular Force 4. Magnetic Force

250.

Which of the following is/are non-contact force(s)? 1. Gravitational Force 2. Electrostatic Force 3. Muscular Force 4. Magnetic Force

Answer»

Which of the following is/are non-contact force(s)?

1. Gravitational Force

2. Electrostatic Force

3. Muscular Force

4. Magnetic Force

Discussion

Explore topic-wise InterviewSolutions in .

A car moves from x to y with a uniform speed v and returns to y with a uniform speed u. The average speed for this round trip is?

two block system one over the other moves with cons†an t velocity 10m/s towars right all surfaces in contact are rough the frictional force applied by lower block on upper block is:

What are star maps and what are they used for?

This type of scissor is used as a:

On moving down the group 15 , the density increases how?

Question 2: What are the properties of solid? Name all the three states of water.

Time period of a simple pendulum is T. Time taken by it to complete 3/8 oscillations starting from mean position is(1) 3T/12(2) 3T/8(3) 7T/12(4) 5T/12

116.When a horse pulls a cart, what is the reverse force? Why does'nt the cart go backwords??

When 2 wires are at same potential will short circuit occur when they touch each other?

Suggest three measures to limit noise pollution in your locality.

What is an image?

Calculate the mechanical advantage of a lever in which the effort arm is 50 cm and the load arm is 2 cm. ___

What is the area of a rectangle having length 6 cm and breadth 4 cm ?

what is friction

v × mv is equal to 0 how

How can Srishti makes a polygon using 1) 5 Sticks of equal length. 2) 3 Sticks of equal length.

what are natural magnets ? what is the difference between normal and natural magnet ?

Harish ran a certain distance faster than Suresh. Which fundamental physical quantity/quantities is/are measured for comparing their speeds?

Name the two windows of the ear and explain their respective functions.

A body is kept at rest on a horizontal plane. After giving it a short push, it travels for some distance and finally comes to rest. Which of the following forces is responsible for stopping the body?

what is angle of contact and stokes law?

Mechanical advantage (M. A), load (L) and effort (E) are related as : (a) M.A = L × E (b) M.A. × E = L (c) E= M.A. × L (d) none of these.

A fluid friction is a __ offered by a fluid against its flow.

A block of mass 15 kg is resting on a rough inclined plane as shown in figure. The blocks tied up by a horizontal string which has a tension of S0N. The coefficient of frictionbetween the surface is

Calclate the work done in pulling an object with a constant force F as shown in figure, so that the blockmoves with a constant velocity through a distance 'd'. (given that the ground is rough with coefficientfriction μ )

Harshit is sitting inside a stationary bus. Which of the following objects will appear to be moving with respect to him?

Which of the following are reasons why a rod cannot be used as a standard for measuring length?

There are cups in 6 quarts.

A conveyer belt is moving at a cons†an t speed of 2 m/s.A box is gently dropped them is μ=0.5 .The dis†an ce that the box will move relative to belt before coming to rest on it, taking g=10 m/s^{

11A wire of resistance 72 Q is bent in the form of anequilateral triangle. The resistance between twovertices is(1) 8 Ω(2) 16 Ω(3) 32Ω(4) 22 Ω

Question 4 In the following arrangement shown in Fig., the bulb will not glow if the ends A and B are connected with (a) A steel spoon (b) A metal clip (c) A plastic clip (d) A copper wire

Why does sound come when a balloon burst open ??

List any four properties of a magnet.

The tail of a comet points :

The length of the path travelled by a body is known as __________.

Is light necessary to see objects?

A machine has a mechanical advantage of 10. It used to lift a load of 200 kgf. Find the required effort.

Draw an electric circuit in which a cell is used to light a bulb, using components b, c and d of Question 1. Mark the direction of current in the circuit.

In which direction does friction act, when a block is moved up the inclined plane?

what is units

To make accurate measurements there are two main requirements. What are they?

A student performs experiment with simple pendulum and measures time for 10 vibration.if he measures a time for 100 vibrations,the relative error in the measurement of time period will be reduced by

The volume of the cube is 27 cm3. If this cube is cut into 9 smaller cubes then, what's the volume of each smaller cube?

___ objects emit light by itself.

The commercial unit of power is kWh, which is equal to:

When is an object said to be in motion?

Fast oscillations are called ___.

Which of the following is/are non-contact force(s)? 1. Gravitational Force 2. Electrostatic Force 3. Muscular Force 4. Magnetic Force