Question

In a series LCR circit R = 10 $\Omega$ and the impedance Z = 20 $\Omega$ . Then the phase difference between the current and the voltage is

• A. ${60}^{\circ }$
• B. ${30}^{\circ }$
• C. ${45}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is A ${60}^{\circ }$

$Cos\Phi =\frac{R}{Z}=\frac{10}{20}=\frac{1}{2}$
$\Phi ={60}^{\circ }$