MDCAT Physics MCQ #509

Which formula correctly calculates power in a resistor when voltage V is constant?

MDCAT Physics MCQ #509

  1. Question 1

    Q1. Which formula correctly calculates power in a resistor when voltage V is constant?

    • A) P = V²/R
    • B) P = I²R
    • C) P = IV
    • D) All three are equivalent

    Answer: All three are equivalent

    Explanation: All are mathematically equivalent via Ohm’s law. None fails when voltage is constant.