Question
A sonometer wire of length l vibrates in fundamental mode when excited by a tuning fork of frequency 416 Hz. If the length is doubled keeping other things same, the string will
A sonometer wire of length l vibrates in fundamental mode when excited by a tuning fork of frequency 416 Hz. If the length is doubled keeping other things same, the string will
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Solution
The correct option is D vibrate with a frequency of 416 Hz
When the length is doubled keeping other things constant, the fundamental frequency must be halved asf α 1L But the tuning fork is still vibrating with 416 Hz, which will be the second harmonic of the string. String will vibrate with this frequency only.
vibrate with a frequency of 416 Hz
When the length is doubled keeping other things constant, the fundamental frequency must be halved asf α 1L But the tuning fork is still vibrating with 416 Hz, which will be the second harmonic of the string. String will vibrate with this frequency only.
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