A) Zero
B) \[\frac{\pi }{2}\]
C) \[\pi \]
D) \[\frac{3\pi }{4}\]
Correct Answer: A
Solution :
Beats period = \[\frac{1}{30-20}=0.1\] sec \[\Delta \varphi =\frac{2\pi }{T}\Delta .t=\frac{2\pi }{0.1}\times 0.6=2\pi \times 6=12\]\[\pi \] or Zero.You need to login to perform this action.
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