Electrostatics Question 66
Question: 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 [MP PMT 1995]
Options:
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
Show Answer
Answer:
Correct Answer: A
Solution:
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.
