p E Since the current is I = switch The figure above shows a circuit containing an electromotive force (a battery), a capacitor with a capacitance of C farads (F), and a resistor with a resistance of R ohms (2). The voltage drop across the capacitor is Q/C, where is the charge (in coulombs), so in this case Kirchhoff's Law gives = = с dQ dt R , we have Suppose the resistance is 20 , the capacitance is 0.15F, a battery gives a constant voltage of E(t) Find the charge and the current at time t. Q(t) I(t) = RI+ 2 = E(t). dQ R- + dt Q = E(t). 60V, and the initial charge is (0) = 0C.

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Capacitor

The capacitor is an element used to store electrical energy in the electrical field. A capacitor is a form of passive energy.