engineering physics MCQ #1255

The self-inductance of a coil is 0.8 H. If current changes from 0 to 4 A in 0.4 s, find induced emf.

engineering physics MCQ #1255

  1. Question 1

    Q1. The self-inductance of a coil is 0.8 H. If current changes from 0 to 4 A in 0.4 s, find induced emf.

    • A) 8 V
    • B) -8 V
    • C) 4 V
    • D) -4 V

    Answer: 8 V

    Explanation: ε = -L(dI/dt) = -0.8 * (4 / 0.4) = 8 V.