1.

The figure shows four progressive waves A, B, C 8 l D. It can be concluded from the figure that with respectto wave A:

Answer»

The wave C is AHEAD by a phase ANGLE of `pi//2` & the waveB lags behind by a phase angle `pi//2`
The wave C lags behind by a phase angle of `pi//2` & the wave B is ahead by a phase angle of `pi//2`
he wave C is ahead by a phase angle of `pi` the wave B lags behind by the phase angle of `pi`
The wave C lags behind by a phase angle of `(pi)`& the wave B is ahead by a phase angle of `(pi)`

SOLUTION :In FIGURE, 'C REACHES the position where A already reached after `omegat = (pi)/(2)`
And A reaches the positions where B already reached after `omegat = (pi)/(2)`


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