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Physics
Alternating Current
a
b
c
d
$X_L = \omega L = 2\pi \times \frac{100}{\pi} = 5 \Omega $
R = 5 $\Omega$
Phase angle $tan\theta = \frac{\omega L}{R}$ = 1
$\Rightarrow \theta = \frac{\pi}{4}$