ReasoningModerate1 mark
7(b)
The diagram below shows a wire stretched over a sonometer. Stems of two vibrating tuning forks A and B are touched to the wooden box of the sonometer. It is observed that the paper rider (a small piece of paper folded at the centre) present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box.
Why does the paper rider fly off when the stem of tuning fork B is touched to the box?
Topic: Sound and vibrations
Previous-year question practice database
Answer
Exam answer
Because tuning fork B has the same frequency as the natural frequency of the sonometer wire, resonance occurs and the wire vibrates with large amplitude.
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