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A lamp consumes only 50% of maximum power in an A.C. circuit. What is the phase difference between the applied voltage and the circuit current ?

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A lamp consumes only 50% of maximum power in an A.C. circuit. What is the phase difference between the applied voltage and the circuit current ?

(A)   π/4

(B)   π/3

(C)    π/6

(D)   π/2

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Correct option   (B)  π/3

Explanation:

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