Q 12-07-031NEETJEE MainMedium
A $100\ \Omega$ resistor and a capacitor of reactance $100\ \Omega$ are in series across an ac supply. The phase angle between the current and the supply voltage is
Answer: (B) $45°$, current leading
Concept. In an RC circuit $\tan\phi = \dfrac{X_C}{R}$ and the current leads the voltage.
Step 1. Phase. $\tan\phi = \dfrac{100}{100} = 1 \Rightarrow \phi = 45°$, current leading.
Answer. $45°$, current leading (Option B).
Solution by Sreeraj P, M.Sc Physics