MDCAT Physics MCQ #502

A 1.5 V battery with internal resistance r powers a resistor R. Which quantity remains constant when R is varied?

MDCAT Physics MCQ #502

  1. Question 1

    Q1. A 1.5 V battery with internal resistance r powers a resistor R. Which quantity remains constant when R is varied?

    • A) Terminal voltage
    • B) Current through R
    • C) Electromotive force (EMF)
    • D) Power dissipated in R

    Answer: Electromotive force (EMF)

    Explanation: EMF is intrinsic to the battery. Terminal voltage changes with current. Option C is unchanging.