13232 + Interview Questions in Physics Page 191 InterviewSolution

9501.	How much time will it take for a body with acceleration 2 m/s2 , to attain a velocity of 10 m/s? (Starting from rest)
Answer» How much time will it take for a body with acceleration 2 $m / s^{2}$ , to attain a velocity of 10 m/s? (Starting from rest)

Discussion

9502.	A fielder in a game of cricket pulls his hands backwards after holding the ball shot by the batsman. This enables the fielder to
Answer» A fielder in a game of cricket pulls his hands backwards after holding the ball shot by the batsman. This enables the fielder to

9502.

A fielder in a game of cricket pulls his hands backwards after holding the ball shot by the batsman. This enables the fielder to

Answer»

A fielder in a game of cricket pulls his hands backwards after holding the ball shot by the batsman. This enables the fielder to

Discussion

9503.	Is the rotation of the earth around a fixed axis an example of circular motion?
Answer» Is the rotation of the earth around a fixed axis an example of circular motion?

Discussion

9504.	A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.
Answer» A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.

Discussion

9505.	If we know the magnitude of net force acting on a body of a given mass initially at rest, with help of Newton's second law, we can determine its
Answer» If we know the magnitude of net force acting on a body of a given mass initially at rest, with help of Newton's second law, we can determine its

Discussion

9506.	How is light formed?
Answer» How is light formed?

Discussion

9507.	Why are sound wave are called mechanical wave
Answer» Why are sound wave are called mechanical wave

Discussion

9508.	A cannon ball is fired with a velocity 200 m/sec at an angle of 60∘ with the horizontal. At the highest point of its flight it explodes into 3 equal fragments, one going vertically upwards with a velocity 100 m/sec, the second one falling vertically downwards with a velocity 100 m/sec. The third fragment will be moving with a velocity
Answer» A cannon ball is fired with a velocity 200 m/sec at an angle of $60^{\circ}$ with the horizontal. At the highest point of its flight it explodes into 3 equal fragments, one going vertically upwards with a velocity 100 m/sec, the second one falling vertically downwards with a velocity 100 m/sec. The third fragment will be moving with a velocity

Discussion

9509.	For spherical mirrors
Answer» For spherical mirrors

Discussion

9510.	A wire of resistance 20 ohm is bent in form of a circle. Find the equivalent resistance between two diametrically opposite ends.
Answer» A wire of resistance 20 ohm is bent in form of a circle. Find the equivalent resistance between two diametrically opposite ends.

Discussion

9511.	An object is said to be in a state of free fall when:
Answer» An object is said to be in a state of free fall when:

Discussion

9512.	A boy starts from his house and travels 5km to reach the market. After purchasing he returns to his house. Find the displacement of the boy.
Answer» A boy starts from his house and travels 5km to reach the market. After purchasing he returns to his house. Find the displacement of the boy.

Discussion

9513.	When you bang the door with your hand, you get hurt. Why does this happen?
Answer» When you bang the door with your hand, you get hurt. Why does this happen?

Discussion

9514.	Is displacement/time = distance/time in a particular direction?
Answer» Is displacement/time = distance/time in a particular direction?

Discussion

9515.	The area under a speed-time graph represents a physical quantity which has the unit of: (a) m (b) m2 (c) ms−1 (d) ms−2
Answer» The area under a speed-time graph represents a physical quantity which has the unit of: (a) m (b) $m^{2}$ (c) ${m s}^{- 1}$ (d) ${m s}^{- 2}$

9515.

The area under a speed-time graph represents a physical quantity which has the unit of: (a) m (b) m2 (c) ms−1 (d) ms−2

Answer»

The area under a speed-time graph represents a physical quantity which has the unit of:

(a) m

(b) $m^{2}$

(c) ${m s}^{- 1}$

(d) ${m s}^{- 2}$

Discussion

9516.	Complete the following sentences : (a) An average person can hear sound of frequencies in the range ___ to ___. (b) Ultrasound is of frequency ___ . (c) Infrasonic sound is of frequency ___ . (d) Bats can produce and hear ___ sound. (e) Elephants produce ___ sound.
Answer» Complete the following sentences : (a) An average person can hear sound of frequencies in the range ___ to ___. (b) Ultrasound is of frequency ___ . (c) Infrasonic sound is of frequency ___ . (d) Bats can produce and hear ___ sound. (e) Elephants produce ___ sound.

9516.

Complete the following sentences : (a) An average person can hear sound of frequencies in the range _ to _. (b) Ultrasound is of frequency _ . (c) Infrasonic sound is of frequency _ . (d) Bats can produce and hear _ sound. (e) Elephants produce _ sound.

Answer»

Complete the following sentences :

(a) An average person can hear sound of frequencies in the range ___ to ___.

(b) Ultrasound is of frequency ___ .

(c) Infrasonic sound is of frequency ___ .

(d) Bats can produce and hear ___ sound.

(e) Elephants produce ___ sound.

Discussion

9517.	Differentiate between upthrust and weight.
Answer» Differentiate between upthrust and weight.

Discussion

9518.	1. Does the acceleration due to gravity depend on the mass of a body? 2. To estimate the height of a bridge over a river, a stone is dropped freely in the river from the bridge. The stone takes 2 seconds to touch the water surface in the river. Calculate the height of the bridge from the water level (g=9.8 ms−2) [3 MARKS]
Answer» 1. Does the acceleration due to gravity depend on the mass of a body? 2. To estimate the height of a bridge over a river, a stone is dropped freely in the river from the bridge. The stone takes 2 seconds to touch the water surface in the river. Calculate the height of the bridge from the water level $(g = 9.8 m s^{- 2})$ [3 MARKS]

Discussion

9519.	Express 1 tonne into quintals.
Answer» Express 1 tonne into quintals.

Discussion

9520.	Name the technique by which doctors can produce pictures showing the insides of the human body.
Answer» Name the technique by which doctors can produce pictures showing the insides of the human body.

Discussion

9521.	A ray of light traveling in air falls on the surface of water. The angle of incidence is 600 with the normal to the surface. The refractive index of water = 43. Calculate the angle of refraction. [2 MARKS]
Answer» A ray of light traveling in air falls on the surface of water. The angle of incidence is $60^{0}$ with the normal to the surface. The refractive index of water = $\frac{4}{3}$ . Calculate the angle of refraction. [2 MARKS]

Discussion

9522.	Can earth be at state of rest and what makes it to revolve around sun
Answer» Can earth be at state of rest and what makes it to revolve around sun

Discussion

9523.	For a sound wave, the reflected wave, incident wave and the normal to the reflecting surface always lie ___.
Answer» For a sound wave, the reflected wave, incident wave and the normal to the reflecting surface always lie ___.

Discussion

9524.	Find out the temperature in degree Celsius at which the Fahrenheit scale will give twice the reading to that of Celsius scale.
Answer» Find out the temperature in degree Celsius at which the Fahrenheit scale will give twice the reading to that of Celsius scale.

Discussion

9525.	Why do Gas particles move randomly?
Answer» Why do Gas particles move randomly?

Discussion

9526.	3O2 —UV —light——> 2O3 THIS IS AN EXAMPLE OF A REATION USING LIGHT. IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.
Answer» 3O₂ ^{—UV —light——>}2O₃ THIS IS AN EXAMPLE OF A REATION USING LIGHT. IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.

9526.

3O2 —UV —light——> 2O3 THIS IS AN EXAMPLE OF A REATION USING LIGHT. IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.

Answer»

3O₂ ^{—UV —light——>}2O₃

THIS IS AN EXAMPLE OF A REATION USING LIGHT.

IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.

Discussion

9527.	What is the term for the capacity of a body or system to do work?
Answer» What is the term for the capacity of a body or system to do work?

Discussion

9528.	Explain the functioning of ultrasonography. [3 MARKS]
Answer» Explain the functioning of ultrasonography. [3 MARKS]

Discussion

9529.	Two beakers of different shapes are filled up with the same liquid up to the same height. Points I and II in one beaker lie at the same height as points III and IV respectively in the other beaker (as shown in the given figure). Which of the following statements is incorrect regarding the pressures at points I, II, III,and IV?
Answer» Two beakers of different shapes are filled up with the same liquid up to the same height. Points I and II in one beaker lie at the same height as points III and IV respectively in the other beaker (as shown in the given figure). Which of the following statements is incorrect regarding the pressures at points I, II, III,and IV?

9529.

Two beakers of different shapes are filled up with the same liquid up to the same height. Points I and II in one beaker lie at the same height as points III and IV respectively in the other beaker (as shown in the given figure). Which of the following statements is incorrect regarding the pressures at points I, II, III,and IV?

Answer»

Two beakers of different shapes are filled up with the same liquid up to the same height. Points I and II in one beaker lie at the same height as points III and IV respectively in the other beaker (as shown in the given figure).

Which of the following statements is incorrect regarding the pressures at points I, II, III,and IV?

Discussion

9530.	What is Ultrasound? Explain the applications of ultrasound. [5 MARKS]
Answer» What is Ultrasound? Explain the applications of ultrasound. [5 MARKS]

Discussion

9531.	Masses of three wires of copper are in the ratio 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are
Answer» Masses of three wires of copper are in the ratio 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are

Discussion

9532.	What is the correct defination for motion ?
Answer» What is the correct defination for motion ?

Discussion

9533.	What is magnification in the below diagram? Given OA = 10 cm and O’A’ = 2 cm.
Answer» What is magnification in the below diagram? Given OA = $10 c m$ and O’A’ = $2 c m$ .

9533.

What is magnification in the below diagram? Given OA = 10 cm and O’A’ = 2 cm.

Answer»

What is magnification in the below diagram?

Given OA = $10 c m$ and O’A’ = $2 c m$ .

Discussion

9534.	When the current in a conductor is doubled, keeping its resistance constant, the heat generated in the conductor will be:
Answer» When the current in a conductor is doubled, keeping its resistance constant, the heat generated in the conductor will be:

Discussion

9535.	An object of size 50 cm, placed in front of a spherical mirror at 20 cm, forms an image of size 25 cm above the principal axis. Find out the focal length with sign convention and the type of spherical mirror used?
Answer» An object of size 50 cm, placed in front of a spherical mirror at 20 cm, forms an image of size 25 cm above the principal axis. Find out the focal length with sign convention and the type of spherical mirror used?

Discussion

9536.	Question 16 A motorcyclist drives from A to B with a uniform speed of 30 kmph and returns back with a speed of 20 kmph . Find its average speed.
Answer» Question 16 A motorcyclist drives from A to B with a uniform speed of $30 k m p h$ and returns back with a speed of $20 k m p h$ . Find its average speed.

Discussion

9537.	Which of the following is the S.I. unit of density?
Answer» Which of the following is the S.I. unit of density?

Discussion

9538.	The property of an object by which an object does not change its state by itself is called
Answer» The property of an object by which an object does not change its state by itself is called

Discussion

9539.	What is the time - period of a tuning fork whose frequency is 200 Hz ?
Answer» What is the time - period of a tuning fork whose frequency is 200 Hz ?

Discussion

9540.	Derive the relationship between a Newton and a dyne. [3 MARKS].
Answer» Derive the relationship between a Newton and a dyne. [3 MARKS].

Discussion

9541.	Flow of matter in food chain is not unidirectional because
Answer» Flow of matter in food chain is not unidirectional because

Discussion

9542.	If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h3, then which of the following is true about their corresponding potential energy (PE1, PE2 & PE3):
Answer» If three objects of same mass are dropped from different heights $h_{1}$ , $h_{2}$ & $h_{3}$ such that $h_{1}$ > $h_{2}$ < $h_{3}$ , then which of the following is true about their corresponding potential energy ( $P E_{1}$ , $P E_{2}$ & $P E_{3}$ ):

Discussion

9543.	If a rocket is flying what will be it's motion
Answer» If a rocket is flying what will be it's motion

Discussion

9544.	A 8000kg engine pulls a train of 5 wagons, each of 2000kg, along a horizontal track. If the engine exerts a force of 40000N and the track offers a friction force of 5000N, then calculate: (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2.
Answer» A 8000kg engine pulls a train of 5 wagons, each of 2000kg, along a horizontal track. If the engine exerts a force of 40000N and the track offers a friction force of 5000N, then calculate: (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2.

Discussion

9545.	The volume of a 500 gm sealed packet is 350 cm3. What will be the mass of the water displaced by this packet?(given that density of water = 1g/cm3)
Answer» The volume of a 500 gm sealed packet is 350 cm³. What will be the mass of the water displaced by this packet?(given that density of water = 1g/cm³)

Discussion

9546.	Can we obtain Newton’s 3rd law using Newton’s 2nd law?
Answer» Can we obtain Newton’s 3rd law using Newton’s 2nd law?

Discussion

9547.	A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of 10ms. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of 10ms? ___N
Answer» A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of $10 \frac{m}{s}$ . If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of $10 \frac{m}{s}$ ? ___N

9547.

A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of 10ms. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of 10ms? ___N

Answer»

A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of $10 \frac{m}{s}$ . If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of $10 \frac{m}{s}$ ?

___N

Discussion

9548.	Question 20 If an electric iron of 1200 W is used for 30 minutes every day, find electric energy consumed in the month of April.
Answer» Question 20 If an electric iron of 1200 W is used for 30 minutes every day, find electric energy consumed in the month of April.

Discussion

9549.	What can you say about the motion of an object whose distance time-graph is a straight line parallel to the time axis ?
Answer» What can you say about the motion of an object whose distance time-graph is a straight line parallel to the time axis ?

Discussion

9550.	The distance between two points A and B is 100 m. A person moves from A to B with a speed of 20 ms−1 and comes back from B to A with a speed of 25 ms−1. Calculate the average speed and the average velocity of the person. [2 MARKS]
Answer» The distance between two points A and B is 100 m. A person moves from A to B with a speed of $20 m s^{- 1}$ and comes back from B to A with a speed of $25 m s^{- 1}$ . Calculate the average speed and the average velocity of the person. [2 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

How much time will it take for a body with acceleration 2 m/s2 , to attain a velocity of 10 m/s? (Starting from rest)

A fielder in a game of cricket pulls his hands backwards after holding the ball shot by the batsman. This enables the fielder to

Is the rotation of the earth around a fixed axis an example of circular motion?

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.

If we know the magnitude of net force acting on a body of a given mass initially at rest, with help of Newton's second law, we can determine its

How is light formed?

Why are sound wave are called mechanical wave

For spherical mirrors

A wire of resistance 20 ohm is bent in form of a circle. Find the equivalent resistance between two diametrically opposite ends.

An object is said to be in a state of free fall when:

A boy starts from his house and travels 5km to reach the market. After purchasing he returns to his house. Find the displacement of the boy.

When you bang the door with your hand, you get hurt. Why does this happen?

Is displacement/time = distance/time in a particular direction?

The area under a speed-time graph represents a physical quantity which has the unit of: (a) m (b) m2 (c) ms−1 (d) ms−2

Complete the following sentences : (a) An average person can hear sound of frequencies in the range ___ to ___. (b) Ultrasound is of frequency ___ . (c) Infrasonic sound is of frequency ___ . (d) Bats can produce and hear ___ sound. (e) Elephants produce ___ sound.

Differentiate between upthrust and weight.

Express 1 tonne into quintals.

Name the technique by which doctors can produce pictures showing the insides of the human body.

A ray of light traveling in air falls on the surface of water. The angle of incidence is 600 with the normal to the surface. The refractive index of water = 43. Calculate the angle of refraction. [2 MARKS]

Can earth be at state of rest and what makes it to revolve around sun

For a sound wave, the reflected wave, incident wave and the normal to the reflecting surface always lie ___.

Find out the temperature in degree Celsius at which the Fahrenheit scale will give twice the reading to that of Celsius scale.

Why do Gas particles move randomly?

3O2 —UV —light——&gt; 2O3 THIS IS AN EXAMPLE OF A REATION USING LIGHT. IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.

What is the term for the capacity of a body or system to do work?

Explain the functioning of ultrasonography. [3 MARKS]

What is Ultrasound? Explain the applications of ultrasound. [5 MARKS]

Masses of three wires of copper are in the ratio 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are

What is the correct defination for motion ?

What is magnification in the below diagram? Given OA = 10 cm and O’A’ = 2 cm.

When the current in a conductor is doubled, keeping its resistance constant, the heat generated in the conductor will be:

An object of size 50 cm, placed in front of a spherical mirror at 20 cm, forms an image of size 25 cm above the principal axis. Find out the focal length with sign convention and the type of spherical mirror used?

Question 16 A motorcyclist drives from A to B with a uniform speed of 30 kmph and returns back with a speed of 20 kmph . Find its average speed.

Which of the following is the S.I. unit of density?

The property of an object by which an object does not change its state by itself is called

What is the time - period of a tuning fork whose frequency is 200 Hz ?

Derive the relationship between a Newton and a dyne. [3 MARKS].

Flow of matter in food chain is not unidirectional because

If three objects of same mass are dropped from different heights h1, h2 &amp; h3 such that h1 &gt; h2 &lt; h3, then which of the following is true about their corresponding potential energy (PE1, PE2 &amp; PE3):

If a rocket is flying what will be it's motion

A 8000kg engine pulls a train of 5 wagons, each of 2000kg, along a horizontal track. If the engine exerts a force of 40000N and the track offers a friction force of 5000N, then calculate: (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2.

The volume of a 500 gm sealed packet is 350 cm3. What will be the mass of the water displaced by this packet?(given that density of water = 1g/cm3)

Can we obtain Newton’s 3rd law using Newton’s 2nd law?

A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of 10ms. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of 10ms? ___N

Question 20 If an electric iron of 1200 W is used for 30 minutes every day, find electric energy consumed in the month of April.

What can you say about the motion of an object whose distance time-graph is a straight line parallel to the time axis ?

The distance between two points A and B is 100 m. A person moves from A to B with a speed of 20 ms−1 and comes back from B to A with a speed of 25 ms−1. Calculate the average speed and the average velocity of the person. [2 MARKS]

Complete the following sentences : (a) An average person can hear sound of frequencies in the range _ to _. (b) Ultrasound is of frequency _ . (c) Infrasonic sound is of frequency _ . (d) Bats can produce and hear _ sound. (e) Elephants produce _ sound.

3O2 —UV —light——> 2O3 THIS IS AN EXAMPLE OF A REATION USING LIGHT. IF ULTRAVIOLET LIGHT FALLS ON OXYGEN THE IT GIVES OZONE,THEN WHY MOST OF THE OXYGEN HAVE NOT BEEN CONVERTED TO OZONE.

If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h3, then which of the following is true about their corresponding potential energy (PE1, PE2 & PE3):