Question

In the $LC$ circuit shown below, the current is in direction as shown and the charges on the capacitor plates have the sign as shown. At this instant

• A. $I$ is increasing $Q$ is increasing
• B. $I$ is increasing $Q$ is decreasing
• C. $I$ is decreasing $Q$ is increasing
• D. $I$ is decreasing and $Q$ is decreasing

Answer 1

Answer: (C)

As clearly ‘ $Q$ ’ is increasing so electric field energy in capacitor must be increasing. And hence, magnetic field energy in inductor must be decreasing. So $I$ is decreasing.