1.

A lamp consumes only 50% of peak power in an a.c. circuit. What is the phase difference between the applied voltage and the circuit current           [MP PMT 2004]

A.            \[\frac{\pi }{6}\]      
B.            \[\frac{\pi }{3}\]
C.            \[\frac{\pi }{4}\]      
D.            \[\frac{\pi }{2}\]
Answer» C.            \[\frac{\pi }{4}\]      


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