Physics · 2013
JEE Main · 25 April 2013, Shift 1 · Q23
A series LR circuit is connected to an ac source of frequency w and the inductive reactance is equal to 2R. A capacitance of capacitive reactance…
A series LR circuit is connected to an ac source of frequency $\displaystyle w$ and the inductive reactance is equal to 2R. A capacitance of capacitive reactance equal to R is added in series with L and R . The ratio of the new power factor to the old one is :
Official answer
(4)
$\displaystyle \sqrt{\frac{5}{2}}$
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JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.