Electro Magnetic Induction And Alternating Currents Question 5

Question: An alternating current of frequency f, is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit is [CPMT 1978; MP PMT 1993; MP PET 1999; AIIMS 2000; Pb. PET 2004; RPET 2001, 03]

Options:

A) R + 2pfL

B) R2+4π2f2L2

C) R2+L2

D) R2+2πfL

Show Answer

Answer:

Correct Answer: B

Solution:

Z=R2+XL2,  XL=ωL and ω=2πf
Z=R2+4π2f2L2



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