engineering physics MCQ #971

The equivalent resistance of two resistors in parallel is 2 ohms. If one resistor is 3 ohms, the other is

engineering physics MCQ #971

  1. Question 1

    Q1. The equivalent resistance of two resistors in parallel is 2 ohms. If one resistor is 3 ohms, the other is

    • A) 6 ohms
    • B) 3 ohms
    • C) 1 ohm
    • D) 4 ohms

    Answer: 6 ohms

    Explanation: 1/R = 1/R1 + 1/R2, so 1/2 = 1/3 + 1/R2. Hence, 1/R2 = 1/2 - 1/3 = (3-2)/6 = 1/6, giving R2 = 6 ohms.