Question

Current through the battery at the instance when the switch $S$ is closed is: (see figure)

• A. zero
• B. 2 A
• C. 4 A
• D. 5 A

Answer 1

The correct option is D 5 A

When switch S is closed, at $t=0$ the capacitance at the top will behave as a short circuit. So the whole circuit will be treated as shown in figure below.
Thus, the current through the battery is $I=10/2=5A$