MDCAT Physics MCQ #430

A battery's internal resistance is 0.5 ohms. When connected to a 5-ohm resistor, the terminal voltage is 4.5V. What is the EMF of the battery?

MDCAT Physics MCQ #430

  1. Question 1

    Q1. A battery's internal resistance is 0.5 ohms. When connected to a 5-ohm resistor, the terminal voltage is 4.5V. What is the EMF of the battery?

    • A) 5V
    • B) 4.5V
    • C) 5.5V
    • D) 6V

    Answer: 5V

    Explanation: EMF = V + Ir, first find I using V = IR, then apply EMF formula.