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ICSE ICSE Class 8 - CISCE Question Bank Solutions for Physics

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In a piano, pitch is decreased by

[7] Sound
Chapter: [7] Sound
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How does sound travel in air?

[7] Sound
Chapter: [7] Sound
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What is longitudinal wave?

[7] Sound
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A switch is connected to the .......... wire.

[8.1] Household Electricity
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Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.

[7] Sound
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The red colour insulated wire in a cable is the .............. wire.

[8.1] Household Electricity
Chapter: [8.1] Household Electricity
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Define the following term:

Frequency

[7] Sound
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Obtain relationship between the time period and frequency.

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Name three characteristics of a musical sound.

[7] Sound
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A fuse wire should have low .................

[8.1] Household Electricity
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Which of the following determines the loudness of a sound wave?

[7] Sound
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How is loudness related to the amplitude of wave?

[7] Sound
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If the amplitude of a wave is doubled, what will be the effect on its loudness?

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Name the unit in which the loudness of sound is expressed.

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Why is the loudness of sound heard by a plucked wire increased when mounted on a sound board?

[7] Sound
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State three factors on which loudness of sound heard by a listener depends.

[7] Sound
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Name the characteristic of sound related to its frequency

[7] Sound
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Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.

[7] Sound
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All wires used in electric circuits should be covered with

[8.1] Household Electricity
Chapter: [8.1] Household Electricity
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Standing at a distance, how is it possible to detect the filling of bucket under a water tap by hearing the sound? 

[7] Sound
Chapter: [7] Sound
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