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A progressive wave on a string is repre...

A progressive wave on a string is represented by the equation `y=0.2 a sin ( pi bx - 2 pi kt +(pi)/(6))`. The amplitude of the wave is

A

`(22)/(7)b`

B

`0.2 a `

C

`2a`

D

`a^(2)`

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The correct Answer is:
B
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