# Q7.16  Obtain the answers to (a) and (b) in Exercise 7.15 if the circuit is connected to a ,   supply? Hence, explain the statement that a capacitor is a conductor at very high frequencies. Compare this behaviour with that of a capacitor in a dc circuit after the steady state.

Given,

The capacitance of the capacitor

The resistance of the circuit

Voltage supply

Frequency of voltage supply

The maximum current in the circuit

Hence maximum current in the circuit is 3.9A.

b)

In the case of capacitor, we have

So,

So the time lag between max voltage and max current is :

At high frequencies,  tends to zero. which indicates capacitor acts as a conductor at high frequencies.

In the DC circuit, after a steady state is achieved, Capacitor acts like an open circuit.

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