First slide

AC Circuits

Question

A capacitor is fully charged with a battery. Then the battery is removed and coil is connected with the capacitor in parallel, current varies as

Moderate

A

Increases monotonically
B

Decreases monotonically
C

Zero
D

Oscillates indefinitely

Solution

Capacitor is fully charged. When coil is connected the capacitor starts discharges while coil gets charged when coil gets fully charged capacitor has zero charge. Then the coil discharges thus charging capacitor.

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