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SAT® Subject Test in Physics

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Parallel Capacitor Early Current

SATPHY-CXYCE1

The circuit pictured below shows a battery, two resistors, an uncharged capacitor in parallel with one of the resistors, and a switch, which can be opened (as pictured) or closed.

At the instant the switch is closed, what is the current through the 12.0 ohm resistor?

A

0.75 A

B

1.50 A

C

0.50 A

D

0.67 A

E

No current flows through the 12.0 ohm resistor (0 A).