engineering physics MCQ #1238

The magnetic flux linked with a coil is given by ϕ = 5t² + 3t + 16. Find induced emf at t = 4 s.

engineering physics MCQ #1238

  1. Question 1

    Q1. The magnetic flux linked with a coil is given by ϕ = 5t² + 3t + 16. Find induced emf at t = 4 s.

    • A) 43 V
    • B) 40 V
    • C) 63 V
    • D) 83 V

    Answer: 43 V

    Explanation: Induced emf ε = -dϕ/dt = -(10t + 3) = -43 V at t = 4 s. Magnitude is 43 V.