In the following circuit R_1=3 Ohm, R_2=10 Ohm, C=0.003 Farad, V=5 Volts.

Question

At time t =0 we connect the power supply to the circuit. At t=0 the capacitor is uncharged.

(a) What is the time constant tau (in seconds) to charge up the capacitor?

(b) What is the electric potential over the capacitor when it is fully charged?

(c) Calculate the current delivered by the power supply as a function of time and evaluate it (in Ampere) for t=0.6 tau, where tau is the value obtained in part (a).

(d) What is the current delivered by the power supply when the capacitor is fully charged?

(e) How much energy (in Joules) is in the capacitor when it is fully charged?

Answer 1

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