A) 30°
B) 40°
C) 80°
D) 90°
Correct Answer: C
Solution :
\[\tan \varphi =\frac{\omega L}{R}=\frac{2\pi \times 50\times 0.21}{12}=5.5\,\Rightarrow \,\varphi ={{80}^{o}}\]You need to login to perform this action.
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