Sound - Maharashtra Board STD 8 Science Questions

Q 1MCQ1 Mark

In the experiment to show that a medium is necessary for propagation of sound, as the quantity of air inside the bell jar decreases, the level of ringing sound heard outside ……………… .

A
increases
✓
decreases
C
fluctuates randomly
D
changes at regular intervals

Answer: B.

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Q 2MCQ1 Mark

If the frequency of a sound wave is 512 Hz, the number of rarefactions produced per second is ……………… .

A
256
✓
512
C
1024
D
128

Answer: B.

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Q 3MCQ1 Mark

Sound waves cannot travel through a ………… .

A
solid
B
liquid
C
gas
✓
vacuum

Answer: D.

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Q 4Write the following Statement Is True Or False. & Write True Statement.1 Mark

In Jaltarang, the frequency of sound produced is independent of the height of the air column inside the glass cup.

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Q 5Write the following Statement Is True Or False. & Write True Statement.1 Mark

If the vibrating length of a stretched string is kept constant and the tension in the string is increased, the frequency of the sound produced increases.

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Q 6Answer the following in one sentece.1 Mark

How is sound produced?

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Q 7Answer the following questions in detail.2 Marks

State the factors on which the frequency of a tuning fork depends.

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Q 8Answer the following questions in detail.2 Marks

Explain the term frequency of a sound wave.

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Q 9Answer the following questions in detail.2 Marks

If sound waves are generated in air, what moves away from the source? Is it the air itself or the state of compression and rarefaction created in the air?

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Q 10Fill In The Blanks.1 Mark

In a loudspeaker, …………… energy is converted into ………….. energy.

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Q 11Fill In The Blanks.1 Mark

Different sound notes have different ………………. .

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Q 12Fill In The Blanks.1 Mark

The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is ………… .

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Q 13Fill In The Blanks.1 Mark

Medium is …………… for generation of sound.

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Q 14Fill In The Blanks.1 Mark

The region in a sound wave, with higher pressure and density is called ………….. and that with low pressure and density is called ……….. .

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Q 15Answer the following question.3 Marks

Tabla (Percussion instrument):

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Q 16Answer the following question.3 Marks

Flute, Saxophone and Shehnai (Wind instruments):

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Q 17Answer the following question.3 Marks

Sitar, Santoor and Mandoline or mandoline (String instruments):

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Q 18Answer the following question.3 Marks

Identify the instruments and discuss sound production in them. [Students should see these musical instruments.

Sitar
Shehnai
Flute
Tabla
Santoor
Bugle
Mandoline or Mandolin
Saxophone.

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Q 19Answer the following question.5 Marks

Explain the experiment, with0 a neat diagram, to prove the following:
‘Sound needs a material medium for propagation.’

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Q 20Answer the following question.5 Marks

How is sound produced in the human larynx and a loudspeaker?

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Q 21Answer the following question.5 Marks

How are different sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation?

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Q 22Answer the following question.5 Marks