MDCAT Physics MCQ #456

Two resistors of 2 ohm and 4 ohm are connected in series. If the current through the 2 ohm resistor is 3 A, what is the voltage across the 4 ohm resistor?

MDCAT Physics MCQ #456

  1. Question 1

    Q1. Two resistors of 2 ohm and 4 ohm are connected in series. If the current through the 2 ohm resistor is 3 A, what is the voltage across the 4 ohm resistor?

    • A) 6 V
    • B) 12 V
    • C) 8 V
    • D) 4 V

    Answer: 12 V

    Explanation: The current through both resistors is the same in series, so I = 3 A. Using Ohm's Law for the 4 ohm resistor, V = IR = 3 * 4 = 12 V. Option A is incorrect because it misapplies Ohm's Law.