Which describes the magnetic field due to the displacement current in a capacitor?
a It is zero as the capacitor is being charged and then is nonzero after the charging is complete.
b It exists as the capacitor is being charged and then is zero after the charging is complete.
c It exists as the capacitor is being charged and then has the same value after the charging is complete.
Answer:
b It exists as the capacitor is being charged and then is zero after the charging is complete.
Explanation:
The magnetic field due to displacement current is proportional to the displacement current . The magnitude of displacement current is equal to charging current of a capacitor. In the beginning , charging current is maximum but as capacitor is charged gradually , charging current decreases . Ultimately , it becomes zero.
Hence the magnetic field will also become zero in the end.