THU more is the sound of a vibrating body, the louder is the sound produced by it.
(vi)
musical instruments respectively.
and the
types of
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(viii) Loudness is determined
(vii) The drum and the harmonium belong to the
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Answer is B.
A drum produces sound of lower frequency which is less shrill and has lower pitch, while a whistle produces sound of higher frequency which is shriller and is of higher pitch. The number of vibrations or oscillations per second is called frequency. In the figure B, the frequency of the first wave is lower and the frequency of the second wave is higher. This interprets the frequency of the drum and the whistle.
Hence, the option B is correct.
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