A)
B) \[63\text{ }{}^\circ 9'\]
C) \[55\text{ }{}^\circ 4'\]
D) \[50{}^\circ \]
Correct Answer: C
Solution :
\[\tan \phi =\frac{{{X}_{L}}-{{X}_{C}}}{R}=\frac{31\,.\,4-14}{12}=1\,.\,45\] \[\phi ={{\tan }^{-1}}\left( 1.45 \right)=55{}^\circ 4'\]
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