TS EAMCET 4-Aug-2021 Shift 2 Question Paper

Given, beat frequency =8Hz.
Beat frequency reduces to 4Hz, if tension reduces.
Since, f=‌

1

2l

√‌

T

µ

⇒f∝√T
where, f= frequency, l= length, T= tension and µ= mass per unit length.
‌fA−fB‌‌=8
⇒‌‌fB‌‌=fA−8
Here, fA and fB are frequency of string A\B.
‌fA‌‌=320Hz
∴‌‌fB‌‌=320−8=312Hz