A 500 kΩ potentiometer is connected across a 5 V source. If the voltage from the wiper to the lower end of the potentiometer is 1.2 V, what is the resistance of that lower part?
A)500 kΩ
B)0 Ω
C)120 kΩ
D)380 kΩ

Question

Quizplus · Accepted Answer

The voltage divider rule states that the voltage across a portion of a resistor is proportional to its resistance. The resistance of the lower part can be calculated using the formula: (1.2 V / 5 V) * 500 kΩ = 120 kΩ.

A 500 KΩ Potentiometer Is Connected Across a 5 V