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Q.

When two tuning forks are sounded together x beats/sec are heard and frequency of A is n. Now when one prong of B is loaded with little wax, the number of beats per second decreases. The frequency of fork B is

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a

n+x

b

n−x

c

n−x2

d

n−2x

answer is A.

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Detailed Solution

A            B
n           n±x
n+x    or  n−x
 

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