A 5-µF capacitor is charged to 30 V and is then connected across a 10-µH inductor.The maximum value of the current in this circuit is
A)1.41 A
B)2.25 A
C)8.73 A
D)15.4 A
E)21.2 A

Question

Quizplus · Accepted Answer

The maximum value of current in an LC circuit is given by:
Imax = V / sqrt(LC)
Where V is the initial voltage across the capacitor, L is the inductance, and C is the capacitance.

Substituting the given values, we get:
Imax = 30 V / sqrt(10 µH x 5 µF)
Imax = 21.2 A

Therefore, the answer is E) 21.2 A.

A 5-µF Capacitor Is Charged to 30 V and Is