If R1 = 12 kΩ and R2 = 5 kΩ and they are wired in series across a 20 V source, what is VR1 and VR2?
A)VR1 = 0 V, VR2 = 20 V
B)VR1 = 10 V, VR2 = 10 V
C)VR1 = 14.12 V, VR2 = 5.88 V
D)VR1 = 5.88 V, VR2 = 14.12 V

Question

Quizplus · Accepted Answer

In a series circuit, the voltage is divided among the resistors proportionally to their resistance. VR1 = (R1 / (R1 + R2)) * 20V = (12k / 17k) * 20V = 14.12V and VR2 = (R2 / (R1 + R2)) * 20V = (5k / 17k) * 20V = 5.88V.

If R1 = 12 KΩ and R2 = 5 KΩ