engineering physics MCQ #1257

The magnetic flux linked with a coil is ϕ = 3t³ + 2t² + 1. Find induced emf at t = 1 s.

engineering physics MCQ #1257

  1. Question 1

    Q1. The magnetic flux linked with a coil is ϕ = 3t³ + 2t² + 1. Find induced emf at t = 1 s.

    • A) 13 V
    • B) 12 V
    • C) 11 V
    • D) 10 V

    Answer: 13 V

    Explanation: ε = -dϕ/dt = -(9t² + 4t) = 13 V at t = 1 s.