ICS Part 1 Physics English Medium Chapter 8 Online Short Questions Test with Answers

Online Short Questions For Chapter 8 "ICS Part 1 Physics Chapter 8 Short Questions Test "

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Physics - ICS Part 1 Physics Chapter 8 Short Questions Test

Question # 1

What is progressive wave? Give the name of two progressive waves.

Ans 1: A wave which transfer energy by moving away from the source of disturbance is called progressive wave.

For Example, longitudinal and transverse waves.

Question # 2

How stationary waves are produced in a medium.

Ans 1: These waves are produced by the superposition of two identical waves travelling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 3

How should a source of sound move with.r.t an observer so that the frequency of its sound does not change?

Ans 1: If sound source is moving in circular path with the observer at the center of the circle then relative velocity of the observer with respect to the source of sound is zero, there will be no change in the frequency of sound.

Question # 4

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

Ans 1: No, it is not possible for two identical waves travelling in the same direction along a string to give rise to stationary waves, For stationary waves,wo identical waves must travel in opposite direction.

Question # 5

Define Doppler Effect.

Ans 1: The apparent change in the frequency of sound due to relative motion between the observer and source of sound is called Doppler Effect. If the observer and source of sound are approaching then the frequency of sound will increase and vice versa.

Question # 6

How stationary waves are produced in a medium

Ans 1: Theses waves are produced by the superposition of two identical waves traveling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 7

What are the factors on which speed of sound in air depends?

Ans 1:
1. Speed of sound is inversely proportional to the square root of densities of gases.
2. Speed of sound increases with the increase in temperature
3. Speed of sound is not affected by a variation in the pressure of the gas.

Question # 8

Give any two applications of Doppler Effect.

Ans 1: Doppler effect is used:
1. In radar systems, the Doppler effect is used to determine the elevation and speed of aero plane.
2. Astronomers use the Doppler Effect to calculate the speed of distant stars and galaxies.

Question # 9

Differentiate between travelling waves and stationary waves.

Ans 1: A waves which transfer energy by moving away from the source of disturbance, is called a travelling wave. The ripples produced in the water are the examples of travelling waves.
Two waves of equal frequency travelling in opposite direction produce stationary waves. In stationary waves energy cannot flow past the nodes and remains "standing" in the medium between nodes. Waves produced in a stretched string and air column are the examples of stationary waves.

Question # 10

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Ans 1: The pipe, which is open at both ends, is richer in harmonics.
At open end molecules of the air are free to move and an antinode is formed while the movement of air molecules is restricted at the closed end and a node is formed.
Therefore, the pipe open at both ends have antinode at each end and is richer in harmonics.

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Prepare Complete Set Wise Questions For Chapter 8 "ICS Part 1 Physics Chapter 8 Short Questions Test "

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ICS Part 1 Physics Chapter 8 Short Questions Test - Set 1

Question # 1

What is progressive wave? Give the name of two progressive waves.

Ans 1: A wave which transfer energy by moving away from the source of disturbance is called progressive wave.

For Example, longitudinal and transverse waves.

Question # 2

How stationary waves are produced in a medium.

Ans 1: These waves are produced by the superposition of two identical waves travelling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 3

How should a source of sound move with.r.t an observer so that the frequency of its sound does not change?

Ans 1: If sound source is moving in circular path with the observer at the center of the circle then relative velocity of the observer with respect to the source of sound is zero, there will be no change in the frequency of sound.

Question # 4

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

Ans 1: No, it is not possible for two identical waves travelling in the same direction along a string to give rise to stationary waves, For stationary waves,wo identical waves must travel in opposite direction.

Question # 5

Define Doppler Effect.

Ans 1: The apparent change in the frequency of sound due to relative motion between the observer and source of sound is called Doppler Effect. If the observer and source of sound are approaching then the frequency of sound will increase and vice versa.

Question # 6

How stationary waves are produced in a medium

Ans 1: Theses waves are produced by the superposition of two identical waves traveling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 7

What are the factors on which speed of sound in air depends?

Ans 1:
1. Speed of sound is inversely proportional to the square root of densities of gases.
2. Speed of sound increases with the increase in temperature
3. Speed of sound is not affected by a variation in the pressure of the gas.

Question # 8

Give any two applications of Doppler Effect.

Ans 1: Doppler effect is used:
1. In radar systems, the Doppler effect is used to determine the elevation and speed of aero plane.
2. Astronomers use the Doppler Effect to calculate the speed of distant stars and galaxies.

Question # 9

Differentiate between travelling waves and stationary waves.

Ans 1: A waves which transfer energy by moving away from the source of disturbance, is called a travelling wave. The ripples produced in the water are the examples of travelling waves.
Two waves of equal frequency travelling in opposite direction produce stationary waves. In stationary waves energy cannot flow past the nodes and remains "standing" in the medium between nodes. Waves produced in a stretched string and air column are the examples of stationary waves.

Question # 10

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Ans 1: The pipe, which is open at both ends, is richer in harmonics.
At open end molecules of the air are free to move and an antinode is formed while the movement of air molecules is restricted at the closed end and a node is formed.
Therefore, the pipe open at both ends have antinode at each end and is richer in harmonics.

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ICS Part 1 Physics Chapter 8 Short Questions Test - Set 2

Question # 1

What happens when a jet plane like a concorde files faster than the speed of sound?

Ans 1: A conical surface of concentrated sound energy sweeps over the ground as a supersonic plane passes overhead. It is known as sonic boom.

Question # 2

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Ans 1: The pipe, which is open at both ends, is richer in harmonics.
At open end molecules of the air are free to move and an antinode is formed while the movement of air molecules is restricted at the closed end and a node is formed.
Therefore, the pipe open at both ends have antinode at each end and is richer in harmonics.

Question # 3

Can Doppler Effect be applied to electromagnetic waves? Give an example.

Ans 1: Yes, Doppler effect can be applied to electromagnetic waves. For example, in radar systems, the Doppler effect is used to determine the elevation and speed of aeroplane.

Question # 4

Define Doppler Effect.

Ans 1: The apparent change in the frequency of sound due to relative motion between the observer and source of sound is called Doppler Effect. If the observer and source of sound are approaching then the frequency of sound will increase and vice versa.

Question # 5

What are the factors on which speed of sound in air depends?

Ans 1:
1. Speed of sound is inversely proportional to the square root of densities of gases.
2. Speed of sound increases with the increase in temperature
3. Speed of sound is not affected by a variation in the pressure of the gas.

Question # 6

Explain the term "Beats" .

Ans 1: Two waves that are travelling in the same direction with a slight difference in frequencies will produce beats.Number of beats per second is equal to the difference in frequencies.

Question # 7

How stationary waves are produced in a medium.

Ans 1: These waves are produced by the superposition of two identical waves travelling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 8

Define transverse waves, Give two examples.

Ans 1: Transverse waves are those in which particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves.
Waves produced in a stretched string and ripple produced in water are good examples of transverse waves.

Question # 9

A wave is produce along a stretched string but some of its particles permanently show zero displacement . What type of wave is it?

Ans 1: A wave is produced along a stretched string but some of its particles permanently show zero displacement. It is a stationary wave and points at zero displacement are called nodes.

Question # 10

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

Ans 1: No, it is not possible for two identical waves travelling in the same direction along a string to give rise to stationary waves, For stationary waves,wo identical waves must travel in opposite direction.

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ICS Part 1 Physics Chapter 8 Short Questions Test - Set 3

Question # 1

How stationary waves are produced in a medium

Ans 1: Theses waves are produced by the superposition of two identical waves traveling in opposite direction. When a stretched string clamped at its two ends is plucked then the stationary waves are produced.

Question # 2

Explain the terms Crest, Trough, Node and Antinode.

Ans 1: Crest: The portion of the wave above the mean level is called crest.
Trough: The portion of the wave below the mean level is called trough.
Nodes: The points of zero displacement in stationary waves are called nodes.
Anti-nodes: The points of maximum displacement in stationary waves are called antinodes.

Question # 3

As the result of distant explosion an observer senses a ground tremor and then hears the explosions.Explain the time difference.

Ans 1: The waves produced by the explosion reach the observer quickly through the ground as compared to the sound waves reaching through the air. This is due to the reason that sound travels faster in solid than gases.

Question # 4

Define Beat and beat frequency.

Ans 1: Beat: Two waves of slightly different frequencies and travelling in the same direction produce beats.

Beat Frequency: Number of beats per second is called beat frequency which is equal to the difference in frequencies.

Question # 5

Give any two applications of Doppler Effect.

Ans 1: Doppler effect is used:
1. In radar systems, the Doppler effect is used to determine the elevation and speed of aero plane.
2. Astronomers use the Doppler Effect to calculate the speed of distant stars and galaxies.

Question # 6

Why "stationary waves" are called standing waves?

Ans 1: In stationary waves energy cannot flow past the nodes and remains "standing" in the medium between nodes. Therefore stationary waves are called standing waves.

Question # 7

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Ans 1: The pipe, which is open at both ends, is richer in harmonics.
At open end molecules of the air are free to move and an antinode is formed while the movement of air molecules is restricted at the closed end and a node is formed.
Therefore, the pipe open at both ends have antinode at each end and is richer in harmonics.

Question # 8

Why ultrasonic waves are preferred on radio waves for the use of undersea communication?

Ans 1: Ultrasonic is a high frequency sound wave. It is not a part of electromagnetic spectrum. Ultrasonic waves transmit energy from one place to another using elastic properties of matter. They are preferred on radio waves for the use of undersea communication because they can travel longer distances in water.

Question # 9

Explain why sound travels faster in warm air than in cold air?

Ans 1:

Question # 10

Define Mechanical and Electromagnetic waves.Give examples of each.

Ans 1: Mechanical Waves: The waves which require any medium for their propagation by the oscillation of material particles are called mechanical waves e.g sound waves, water waves etc.

Electromagnetic waves: The waves which do not require any medium for their propagation are called electromagnetic waves. Fro example, visible light, radio waves, television signals, and x-rays.

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8th Chapter

ICS Part 1 Physics Short Questions Test

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ICS Part 1 Physics English Medium Chapter 8 Online Short Questions Test with Answers

Online Short Questions For Chapter 8 "ICS Part 1 Physics Chapter 8 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 8 Short Questions Test

What is progressive wave? Give the name of two progressive waves.

How stationary waves are produced in a medium.

How should a source of sound move with.r.t an observer so that the frequency of its sound does not change?

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

Define Doppler Effect.

How stationary waves are produced in a medium

What are the factors on which speed of sound in air depends?

Give any two applications of Doppler Effect.

Differentiate between travelling waves and stationary waves.

Which is richer in harmonic, and why:(A) an open organ pipe (B) A closed organ pipe.

Prepare Complete Set Wise Questions For Chapter 8 "ICS Part 1 Physics Chapter 8 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 8 Short Questions Test - Set 1

What is progressive wave? Give the name of two progressive waves.

How stationary waves are produced in a medium.

How should a source of sound move with.r.t an observer so that the frequency of its sound does not change?

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

Define Doppler Effect.

How stationary waves are produced in a medium

What are the factors on which speed of sound in air depends?

Give any two applications of Doppler Effect.

Differentiate between travelling waves and stationary waves.

Which is richer in harmonic, and why:(A) an open organ pipe (B) A closed organ pipe.

ICS Part 1 Physics Chapter 8 Short Questions Test - Set 2

What happens when a jet plane like a concorde files faster than the speed of sound?

Which is richer in harmonic, and why:(A) an open organ pipe (B) A closed organ pipe.

Can Doppler Effect be applied to electromagnetic waves? Give an example.

Define Doppler Effect.

What are the factors on which speed of sound in air depends?

Explain the term "Beats" .

How stationary waves are produced in a medium.

Define transverse waves, Give two examples.

A wave is produce along a stretched string but some of its particles permanently show zero displacement . What type of wave is it?

Is it possible for two identical waves travelling in the same direction along the string to give rise to a stationary wave?

ICS Part 1 Physics Chapter 8 Short Questions Test - Set 3

How stationary waves are produced in a medium

Explain the terms Crest, Trough, Node and Antinode.

As the result of distant explosion an observer senses a ground tremor and then hears the explosions.Explain the time difference.

Define Beat and beat frequency.

Give any two applications of Doppler Effect.

Why "stationary waves" are called standing waves?

Which is richer in harmonic, and why:(A) an open organ pipe (B) A closed organ pipe.

Why ultrasonic waves are preferred on radio waves for the use of undersea communication?

Explain why sound travels faster in warm air than in cold air?

Define Mechanical and Electromagnetic waves.Give examples of each.

ICS Part 1 Physics Short Questions Test

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Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.

Which is richer in harmonic, and why:
(A) an open organ pipe (B) A closed organ pipe.