Electro Magnetic Induction And Alternating Currents Question 110

Question: 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]

Options:

A) π6

B) π3

C) π4

D) π2

Show Answer

Answer:

Correct Answer: B

Solution:

P=12VoiocosφP=PPeak.cosφ
12(Ppeak)=Ppeakcosφcosφ=12φ=π3



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