As shown in figure "A" of the illustration if the applied voltage is 12 VDC, the resistance of R1 is 10 ohms, and R2 is 10 ohms what is the current flowing through R1 when the switch is closed? Illustration EL-0020

Correct Answer: Option A — 0.6 amp

In a series circuit with a 12 VDC source and two 10-ohm resistors, total resistance equals 20 ohms. Current is $12 / 20 = 0.6$ amp. This shared current flows uniformly through every component in the series path per IEEE 45 guidelines.