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The first resonance length using a fork ...

The first resonance length using a fork of frequency `512` is `16.2cm`. The value of second resonance length when fork of frequency 256 is used would be

A

`32.4cm`

B

`8.1 cm`

C

`50.0 cm`

D

`97.8 cm`

Text Solution

Verified by Experts

The correct Answer is:
D
As, frequency is halved from 512 and 256, the first resonance length is doubled, i.e.,
`l_(1)=2xx16.2cm=32.4cm. `Since,`l_(2)gt2l_(1).`
`:. l_(2)gt(3xx32.4=97.2cm).`
Choice `(d)` is correct.
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