Questions
A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle
a
Does not deflect
b
Deflects for a very short time and then comes back to the original position
c
Deflects and remains deflected as long as the battery is connected
d
Deflects and gradually comes to the original position in a time which is large compared to the time constant
detailed solution
Correct option is D
while the capacitor is charging, electric field between the plates of the capacitor is varying, as a result a magnetic field is produced which causes the deflection in compass needle and then comes back slowly.Talk to our academic expert!
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