MDCAT Physics MCQ #547

A battery has EMF of 12V but terminal voltage of 10V when connected to a load. What causes this difference?

MDCAT Physics MCQ #547

  1. Question 1

    Q1. A battery has EMF of 12V but terminal voltage of 10V when connected to a load. What causes this difference?

    • A) Dielectric breakdown
    • B) Internal resistance voltage drop
    • C) Resistivity of connecting wires
    • D) Temperature coefficient effect

    Answer: Internal resistance voltage drop

    Explanation: Internal resistance causes voltage drop when current flows. Option C ignores internal resistance.