An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μ F . The maximum displacement current between the plates of the capacitor is nearly :

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Displacement current is same as conduction current in capacitor. ​ X C ​ = ω C 1 ​ = 2 π fC 1 ​ = 2 π × 4 × 1 0 3 × 12 × 1 0 − 6 1 ​ = 3.317Ω ​ I = X C ​ V ​ = 3.317 40 ​ = 12 A

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