Electro Magnetic Induction And Alternating Currents Question 66

Question: There is a 5Ω resistance in an ac, circuit. Inductance of 0.1H is connected with it in series. If equation of ac e.m.f. is 5sin50t then the phase difference between current and e.m.f. is [RPET 2003]

Options:

A) π2

B) π6

C) π4

D) 0

Show Answer

Answer:

Correct Answer: C

Solution:

cosφ=RZ=RR2+ω2L2=525+(50)2×(0.1)2

=525+25=12φ=π/4



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