series circuit containing a 20 uF capacitor in series with a 0.5 mega ohm resistor is connected to a 45 V battery. a) determine the time constant of the circuit. Ans. TC = RC = ( 20x10 -6 )( 0.5 x 10 6 ) = 10 sec. b) find the time when the voltage across capacitor is 45 volts. VC = v ( 1 + e – t/RC ); t = infinite or at steady state.

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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.