A) 800cm
B) 8cm
C) 0.8cm
D) 80m
Correct Answer: B
Solution :
\[\cos \phi =\frac{R}{\sqrt{{{R}^{2}}+{{\omega }^{2}}{{L}^{2}}}}\] \[\approx \frac{R}{\omega L}\] \[R<<\omega L\] Given, \[R<<\omega L\], Putting them, we get \[\cos \phi \]You need to login to perform this action.
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