Question

An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to $3\Omega$, the phase difference between the applied voltage and the current in the circuit is

• A. $\pi /6$
• B. $\pi /4$
• C. $\pi /2$
• D. Zero

Answer 1

The correct option is B $\pi /4$

$\varphi =ta{n}^{-1}\left(\frac{X_L}{R}\right)=ta{n}^{-1}\left(\frac{3}{3}\right)=ta{n}^{-1}\left(1\right)=\frac{\pi }{4}rad$