electromagnetic-waves Question 21
Question: Q. 12. A capacitor of capacitance ’
U] [O.D. I, II, III 2012]
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Solution:
Ans. Yes, the ammeter will show a momentary deflection.
The momentary deflection is due to the flow of electrons in the circuit during the charging process. During this process, the electric field between the capacitor plates is changing and hence a displacement current flows in the gap. Hence we can say that there is a continuity of current in the circuit.
Expression :
[CBSE Marking Scheme 2013, 2012]
[AI Q. 13. When an ideal capacitor is charged by a
Ans. When an ideal capacitor is charged by a
Due to the changing current, the charge deposited on the plates of the capacitor changes with time. This causes change in electric field between the plates of the capacitor which causes the electric flux to change and gives rise to a displacement current in the region between the plates of the capacitor.
Displacement current is given by
and is equal to the conduction current at all instants.
[CBSE Marking Scheme 2012]
