CBSE Class 12 Physics 2017 Outside Delhi Set 3 Paper

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Question : 3
Total: 8
SECTION -B

Why does current in a steady state not flow in a capacitor connected across a battery? However momentary current does flow during charging or discharging of the capacitor. Explain.
Solution:  
(a) Reason for no flow of current
(b) Reason for momentary current
In the steady state, the displacement current and hence the conduction current, is zero as |
E
|
, between the plates, is constant.
During charging/discharging, the displacement current and hence the conduction current is non zero as |
E
|
, between the plates, is changing with time.
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