engineering physics MCQ #1278

The magnetic flux linked with a coil is given by ϕ = 5t² + 2t + 3. The induced emf at t = 1 s is

engineering physics MCQ #1278

  1. Question 1

    Q1. The magnetic flux linked with a coil is given by ϕ = 5t² + 2t + 3. The induced emf at t = 1 s is

    • A) 12 V
    • B) 10 V
    • C) 8 V
    • D) 6 V

    Answer: 12 V

    Explanation: ε = -dϕ/dt = -(10t + 2), at t = 1, ε = -(10 + 2) = 12 V, using Faraday's law.