engineering physics MCQ #1001

A 10 ohm resistor is connected in series with a variable resistor and a 12 V battery. If the current is 0.5 A, what is the value of variable resistor?

engineering physics MCQ #1001

  1. Question 1

    Q1. A 10 ohm resistor is connected in series with a variable resistor and a 12 V battery. If the current is 0.5 A, what is the value of variable resistor?

    • A) 14 ohm
    • B) 12 ohm
    • C) 10 ohm
    • D) 8 ohm

    Answer: 14 ohm

    Explanation: I = V/R_total, so 0.5 = 12 / (10 + R), hence R = 14 ohm.