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Subject :NSO    Class : Class 7

The quality of sound produced by a tuning fork is different from that produced by a musical instrument because of difference in


the tuning fork produces a shriller sound than musical instruments.As pitch is the characteristic which determines the shrillness of a sound,the answer can be d. At the same time as frequency of a vibrating body determines its pitch the answer can also be b.

Ans 1:

Class : Class 9
every single sound has its own secondary waves, so the correct option must be option C.

Ans 2:

Class : Class 7
correct option is c

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