Question

An inductor and a resistor are connected in series with an AC source. In this circuit

• A. current and potential difference across the resistor lead the potential difference across the inductor.
• B. current and potential difference across the resistor lag behind the potential difference across the inductor by an angle $\frac{\pi }{2}$.
• C. current and potential difference across the resistor lag behind the potential difference across the inductor by an angle $\pi$.
• D. potential difference across the resistor lags behind the potential difference across the inductor by an angle $\frac{\pi }{2}$ but the current in the resistor leads the potential difference across the inductor by an angle $\frac{\pi }{2}$.

Answer 1

The correct option is B current and potential difference across the resistor lag behind the potential difference across the inductor by an angle $\frac{\pi }{2}$.

The L-R Series cuicuit be thisThe phasor diagram for this circuit is
Therfore option b is correct.