ICSE Class 10 Physics 2020 Solved Paper

Question : 45

Total: 67

When a tuning fork [vibrating] is held close to ear, one hears a faint hum. The same [vibrating tuning fork] is held such that its stem is in contact with the table surface, then one hears a loud sound. Explain.

Solution:

When the stem of a vibrating tuning fork is pressed against the top of a table, the tuning fork produces forced vibrations in the table top. The table top has a much large vibrating area than the tuning fork, so the forced vibrations of the table top send forth a greater energy and produces a louder sound than that produced by the tuning fork.

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