engineering physics MCQ #990

A 5 ohm resistor is connected in series with a variable resistor. The total resistance is 10 ohm. What is the value of variable resistor?

engineering physics MCQ #990

  1. Question 1

    Q1. A 5 ohm resistor is connected in series with a variable resistor. The total resistance is 10 ohm. What is the value of variable resistor?

    • A) 5 ohm
    • B) 10 ohm
    • C) 2 ohm
    • D) 15 ohm

    Answer: 5 ohm

    Explanation: In series, R_total = R1 + R2. So, 10 = 5 + R2, hence R2 = 5 ohm.