Home Physics Electrostatics Potential & Capacitance Capacitance A light bulb, a capacitor and a battery are …
Physics Electrostatics Potential & Capacitance Capacitance MCQ (Single Correct)

A light bulb, a capacitor and a battery are connected together as shown here, with switch S initially open. When the switch S is closed, which one of the following is true

A
The bulb will light up for an instant when the capacitor starts charging
B
The bulb will light up when the capacitor is fully charged
C
The bulb will not light up at all
D
The bulb will light up and go off at regular intervals

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The correct answer is:
A

Initially when key is closed, the capacitor acts as short-circuit, so bulb will light up. But finally the capacitor becomes fully charged, so it will act as open circuit, so bulb will not glow.

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