engineering physics MCQ #1263

A solenoid of 1000 turns, area 0.01 m² has an inductance of 0.1 H. If the current changes at 100 A/s, the induced emf is

engineering physics MCQ #1263

  1. Question 1

    Q1. A solenoid of 1000 turns, area 0.01 m² has an inductance of 0.1 H. If the current changes at 100 A/s, the induced emf is

    • A) 10 V
    • B) -10 V
    • C) 100 V
    • D) -100 V

    Answer: 10 V

    Explanation: ε = -L(dI/dt) = -0.1 * 100 = -10 V, magnitude is 10 V.