What is the current flowing through R3 in figure "B" of the illustrated circuit when the switch is closed if the battery voltage is 12 VDC and resistance of R1 is 2 ohms, R2 is 3 ohms, and R3 is 6 ohms, respectively? EL-0019

Correct Answer: Option A — 2 amps

In a parallel circuit, full source voltage appears across each branch. With 12 VDC applied across R3 (6 ohms), Ohm's law (I = V / R) dictates current through R3 is 12 volts divided by 6 ohms, equaling exactly 2 amps.