1.

Figure given below shows four progressive waves A, B, C and D with their phases expressed withrespect to the wave A. It can be calculated from the figure that :-

Answer»

the WAVE C is ahead by a phase angle of`(PI)/(2)`and the wave B LAGS behind by a phase angle of `(pi)/(2)`
the wave C lags behind by a phase angle of `(pi)/(2)` and the wave B is ahead by a phase angle of`(pi)/(2)`
the wave C is ahead by a phase angle of `pi` and the wave B lags behind by a phase angle of `pi`
the wave C lags behind by a phase angle of `pi` and the wave B is ahead by a phase angle of `pi`

Solution :Withrespect to thewaveA waveB isaheadbyaphaseangleof ` (pi)/(2), ` wave c islagsbehindbyphase
angleof `(pi)/(2) `, waveDhasphasedifferenceof `pi`


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