MDCAT Physics MCQ #460

A 4 ohm and a 6 ohm resistor are connected in parallel. If the total current is 5 A, what is the current through the 4 ohm resistor?

MDCAT Physics MCQ #460

  1. Question 1

    Q1. A 4 ohm and a 6 ohm resistor are connected in parallel. If the total current is 5 A, what is the current through the 4 ohm resistor?

    • A) 2 A
    • B) 3 A
    • C) 4 A
    • D) 1 A

    Answer: 3 A

    Explanation: First, find the equivalent resistance, then the voltage across it. Using I1 = (R2/(R1+R2))*I_total for the current division, we get I1 = (6/(4+6))*5 = 3 A. Option A is incorrect because it misapplies the current division rule.