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Questions  

For the stationary wave y=4sinπx15cos(96πt), the distance between a node and the next antinode is (in m)

a
7.5
b
15
c
22.5
d
30

detailed solution

Correct option is A

Comparing given equation with standard equation y=2asin2πxλcos2πvtλ  gives us  2πλ=π15⇒λ=30Distance between nearest node and antinodes = λ4=304=7.5

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