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A standing wave y = 2A sin kx cos omegat...

A standing wave `y = 2A sin kx cos omegat` is set up in the wire `AB` fixed at both ends by two vertical walls (see Fig. 3.197). The region between the walls contains a constant magnetic field `B`. Now answer the following question:

The wire is found to vibrate in the third harmonic. The maximum emf induced is

A

`(4ABomega)/(k)`

B

`(3ABomega)/(k)`

C

`(2ABomega)/(k)`

D

`(ABomega)/(k)`

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