In an RC circuit the value of R is double the value of X_c, the phase angle is then a) 30 degrees b) 45 degrees c)60 degrees?

Jul 17, 2018

None of the above

Explanation:

In a RC circuit:

$Z = R - j {X}_{c} = R \left(1 - \frac{j}{2}\right) q \quad \because R = 2 {X}_{c}$

For phase angle $\phi$:

tan phi = - 1/2 implies phi ~~ -26.57°

Current leads voltage by 26.57°