AIPMT MAINS2011Physics-Waves
AIPMT MAINS 2011 Physics Beats MCQ Question
Type: MCQ-numerical-Medium-Class 11
Two identical piano wires, kept under the same tension T have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which will lead to occurrence of 6 beats/s when both the wires oscillate together would be
A
0.04
B
0.01
C
0.02
D
0.03
Correct Answer
Option C
Detailed Explanation
The beat frequency is the difference in frequencies of the two wires. Using the formula for frequency of a stretched string, the fractional increase in tension is calculated to be 0.02.
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