A tuning fork of known frequency 256 ,Hz makes 5 beats per second… - Vidyadip

MCQ

A tuning fork of known frequency $256\,Hz$ makes $5$ beats per second with the vibrating string of a guitar. The beat frequency decreases to $2$ beats per second when the tension in the guitar string slightly increased. The frequency of the guitar string before increasing the tension was ..... $Hz$

A
$257$
B
$261$
C
$254$
✓
$251$

✓

Answer

Correct option: D.

$251$

d
On increasing tension frequency of wire increases

So,

So beat frequency is decreases in case of $251$ $\mathrm{\,Hz}$

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