MDCAT Physics MCQ #479

A cell of emf 1.5V is connected to a resistor. If the current is 0.5A, what is the internal resistance if the terminal voltage is 1.2V?

MDCAT Physics MCQ #479

  1. Question 1

    Q1. A cell of emf 1.5V is connected to a resistor. If the current is 0.5A, what is the internal resistance if the terminal voltage is 1.2V?

    • A) 0.3 ohms
    • B) 0.6 ohms
    • C) 1 ohm
    • D) 1.5 ohms

    Answer: 0.6 ohms

    Explanation: r = (E - V)/I = (1.5 - 1.2)/0.5 = 0.6 ohms.