A 50 kΩ potentiometer is connected across a 15 V source. If the voltage from the wiper to the lower end of the potentiometer is 3.2 V, what is the resistance of that lower part?
A)50 kΩ
B)10.7 kΩ
C)0 Ω
D)39.3 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 total voltage is 15 V, and the voltage across the lower part is 3.2 V. Therefore, the resistance of the lower part is (3.2/15) * 50 kΩ = 10.7 kΩ.

A 50 KΩ Potentiometer Is Connected Across a 15 V