A 5-µF capacitor is charged to 30 V and is then connected in series with a 10-µH inductor and a 50-$\Omega$ resistor.The potential difference across the capacitor after a long time has passed will be
A)0
B)7 V
C)15 V
D)30 V
E)some value that cannot be determined from the given information.

Question

Quizplus · Accepted Answer

After a long time has passed, the circuit will reach a steady state. In steady state, the capacitor will act like an open circuit for DC voltage, and the inductor will act like a short circuit. Therefore the potential difference across the capacitor will be zero, and the answer is A) 0.

A 5-µF Capacitor Is Charged to 30 V and Is Ω\OmegaΩ

A 5-µF Capacitor Is Charged to 30 V and Is $\Omega$