The circuit in the picture consists of a 12 volt battery, a 6.0 pF capacitor, an

Question

The circuit in the picture consists of a 12 volt battery, a 6.0 pF capacitor, and two resistors R_A = 4.0 Ohm and R_B = 2.0 Ohm. The switch starts open and remains open until part Right after the battery is connected (in other words, the capacitor has still got no charge), calculate the current through the resistor R_A After the capacitor is fully charged, calculate the current through the resistor R_A The switch is then closed. Right after the switch is closed, calculate the current through R_B. A long time after the switch is closed, calculate the current through R_B.

Explanation / Answer

a) current through RA is I = V/RA = 12/4 = 3 A

b) after the capacitor fully charged,there is no accumulation of charges on capacitor,then current through RA is I = 0 A

c) current through RB is = V/RB = 12/2 = 6 A

D) A long time after the capacitor fully discharges,then current through RB is zero

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