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A variable frequency ac source is connected to a capacitor. How will the displacement current change with decrease in frequency ? |
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Answer» Solution :Capacitive reactance is INVERSELY proportional to conduction current, `THEREFORE C_(c )prop (1)/(I_(c ))` and `X_(c )=(1)/(2pi vc)` `therefore X_(c )prop(1)/(f)`and`I_(c )=(V)/(X_(c ))` When frequency decreases `X_(c )` will increase and conduction current also decreases. HENCE conduction current is equal DISPLACEMENT current. |
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