engineering physics MCQ #1265

The self-inductance of a coil is 0.1 H. If the current changes from 1 A to 2 A in 0.1 s, the induced emf is

engineering physics MCQ #1265

  1. Question 1

    Q1. The self-inductance of a coil is 0.1 H. If the current changes from 1 A to 2 A in 0.1 s, the induced emf is

    • A) 1 V
    • B) -1 V
    • C) 10 V
    • D) -10 V

    Answer: 1 V

    Explanation: ε = -L(dI/dt) = -0.1 * (2-1)/0.1 = -1 V, magnitude is 1 V.