engineering physics MCQ #1272

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

engineering physics MCQ #1272

  1. Question 1

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

    • A) 6 V
    • B) -6 V
    • C) 4 V
    • D) -4 V

    Answer: 6 V

    Explanation: ε = -dϕ/dt = -(2t + 2), at t = 2, ε = -(2*2 + 2) = -6 V, magnitude is 6 V.