engineering physics MCQ #1225

The magnetic flux through a coil is φ = 3t² + 4t + 9. The induced emf at t = 2 s is

engineering physics MCQ #1225

  1. Question 1

    Q1. The magnetic flux through a coil is φ = 3t² + 4t + 9. The induced emf at t = 2 s is

    • A) 12 V
    • B) 16 V
    • C) 20 V
    • D) 24 V

    Answer: 16 V

    Explanation: Induced emf = -dφ/dt = -(6t + 4), at t = 2 s, emf = -16 V.