Question

In series LCR circuit, the phase angle between supply voltage and current is:

• A. $\tan \varphi =\frac{X_L-X_C}{R}$
• B. $\tan \varphi =\frac{R}{X_L-X_C}$
• C. $\tan \varphi =\frac{R}{X_L+X_C}$
• D. $\tan \varphi =\frac{X_L+X_C}{R}$

Answer 1

Answer: (A)

$\tan \varphi =\frac{X_L-X_C}{R}$

From above figure:
$tan\varphi =\frac{X_L-X_C}{R}$

option A