engineering physics MCQ #1274

The self-inductance of a coil is 0.01 H. If the current changes from 0 to 1 A in 0.01 s, the induced emf is

engineering physics MCQ #1274

  1. Question 1

    Q1. The self-inductance of a coil is 0.01 H. If the current changes from 0 to 1 A in 0.01 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) = -0.01 * (1-0)/0.01 = -1 V, magnitude is 1 V.