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 the effect of density on speed of sound?

Ans 1:

Question # 2

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 # 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 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.

Question # 5

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 # 6

What do you mean by the term progressive waves?

Ans 1: A wave which tr5ansfer energy by moving away from the source of disturbance is called progressive wave.For example, longitudinal and transverse waves.

Question # 7

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 # 8

Differentiate between longitudinal and transverse waves.

Ans 1: Longitudinal waves: A traveling wave that causes the elements of the medium to move parallel to thee direction of propagation is called a longitudinal wave.

Transverse waves : A traveling wave that causes the elements of the disturbed medium to move perpendicular to the direction of propagation is called a transverse wave.

Question # 9

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 # 10

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.

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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 the effect of density on speed of sound?

Ans 1:

Question # 2

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 # 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 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.

Question # 5

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 # 6

What do you mean by the term progressive waves?

Ans 1: A wave which tr5ansfer energy by moving away from the source of disturbance is called progressive wave.For example, longitudinal and transverse waves.

Question # 7

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 # 8

Differentiate between longitudinal and transverse waves.

Ans 1: Longitudinal waves: A traveling wave that causes the elements of the medium to move parallel to thee direction of propagation is called a longitudinal wave.

Transverse waves : A traveling wave that causes the elements of the disturbed medium to move perpendicular to the direction of propagation is called a transverse wave.

Question # 9

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 # 10

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.

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

Question # 1

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 # 2

What do you mean by the term progressive waves?

Ans 1: A wave which tr5ansfer energy by moving away from the source of disturbance is called progressive wave.For example, longitudinal and transverse waves.

Question # 3

Why can micro waves not detect under water objects?

Ans 1: Microwave are strongly absorbed by sea water within feet of their transmission Ultrasonic is a high frequency sound wave. Its is not part of electromagnetic spectrum. They are preferred on microwaves for the use of undersea communication because they can travel longer distance in water.

Question # 4

What is meant by sonar? Explain.

Ans 1: Sonar is an acronym derived from "sound navigation and ranging".Sonar is the name os technique for detecting the presence of objects under water by acoustical echo.
It employs the Doppler Effect, in which an apparent change in frequency occurs when the source and the observer are in relative motion, Its applications are detection of submarines, mine hunting and depth measurement of sea.

Question # 5

What feature do longitudinal waves have in common with transverse waves?

Ans 1: The common features are:
1. Bothe are mechanical waves.
2. Both transport energy from one place to another.
3. Both satisfy the equation

Question # 6

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 # 7

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 # 8

What do you observe in the collective effect of dots in the form of a picture?

Ans 1: We observe that the picture is made up of many closely spaced dots.
In case of mechanical waves, it is actually the effects of cooperative oscillations of a very large number of the particles of the medium through which the wave is passing.

Question # 9

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 # 10

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

Ans 1:

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

Question # 1

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 # 2

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 # 3

What is the effect of density on speed of sound?

Ans 1:

Question # 4

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 # 5

Why can micro waves not detect under water objects?

Ans 1: Microwave are strongly absorbed by sea water within feet of their transmission Ultrasonic is a high frequency sound wave. Its is not part of electromagnetic spectrum. They are preferred on microwaves for the use of undersea communication because they can travel longer distance in water.

Question # 6

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 # 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

What feature do longitudinal waves have in common with transverse waves?

Ans 1: The common features are:
1. Bothe are mechanical waves.
2. Both transport energy from one place to another.
3. Both satisfy the equation

Question # 9

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 # 10

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.

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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 the effect of density on speed of sound?

Differentiate between travelling waves and stationary waves.

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

Define Mechanical and Electromagnetic waves.Give examples of each.

How stationary waves are produced in a medium

What do you mean by the term progressive waves?

Define transverse waves, Give two examples.

Differentiate between longitudinal and transverse waves.

Explain the terms Crest, Trough, Node and Antinode.

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

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 the effect of density on speed of sound?

Differentiate between travelling waves and stationary waves.

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

Define Mechanical and Electromagnetic waves.Give examples of each.

How stationary waves are produced in a medium

What do you mean by the term progressive waves?

Define transverse waves, Give two examples.

Differentiate between longitudinal and transverse waves.

Explain the terms Crest, Trough, Node and Antinode.

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

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

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

What do you mean by the term progressive waves?

Why can micro waves not detect under water objects?

What is meant by sonar? Explain.

What feature do longitudinal waves have in common with transverse waves?

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

Define Doppler Effect.

What do you observe in the collective effect of dots in the form of a picture?

Explain the term "Beats" .

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

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

Define Doppler Effect.

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

What is the effect of density on speed of sound?

How stationary waves are produced in a medium

Why can micro waves not detect under water objects?

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

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

What feature do longitudinal waves have in common with transverse waves?

Define Beat and beat frequency.

Differentiate between travelling waves and stationary waves.

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.