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The alternating e.m.f. of e = e0 sin ome...

The alternating e.m.f. of `e = e_0 sin omega t` is applied across LR series circuit. The impedance and phase angle between current and voltage is

A

`sqrt(R^2 + X_L^2) , tan^-1 (X_L/R)`

B

`sqrt(R^2 - X_L^2) , tan^-1 (X_L/R)`

C

`R + X_L , tan^-1 (R/X_L)`

D

`R - X_L , tan^-1 (R/X_L)`

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