Wave Mechanics Question 671
Question: A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
Options:
A) $ 510,Hz $
B) $ 514,Hz $
C) $ 516,Hz $
D) $ 508,Hz $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] The frequency of the piano string $ =512\pm 4 $ = 516 or 508. When the tension is increased, beat frequency decreases to 2, it means that frequency of the string is 508 as frequency of string increases with tension.
BETA
