Entry Test MCQ :: Alternating Current

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A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is

[A].	(R+2?fL)	[B].	R+1/2?fL
[C].	(R2+f2L2)	[D].	(R2+4?2f2L2)

Answer: Option D