MDCAT Physics MCQ #520

A potentiometer measures EMF without drawing current. Why is this advantageous?

MDCAT Physics MCQ #520

  1. Question 1

    Q1. A potentiometer measures EMF without drawing current. Why is this advantageous?

    • A) Eliminates voltage drop
    • B) Increases circuit resistance
    • C) Reduces heat generation
    • D) Simplifies circuit design

    Answer: Eliminates voltage drop

    Explanation: No current avoids I·r drops. This ensures accurate EMF measurement unlike voltmeters.