engineering physics MCQ #1254

A circular coil of radius 0.05 m is placed in a uniform magnetic field of 0.5 T. If it's rotated by 180° in 0.1 s, find induced emf.

engineering physics MCQ #1254

  1. Question 1

    Q1. A circular coil of radius 0.05 m is placed in a uniform magnetic field of 0.5 T. If it's rotated by 180° in 0.1 s, find induced emf.

    • A) 0.0785 V
    • B) 0.157 V
    • C) 0.785 V
    • D) 1.57 V

    Answer: 0.0785 V

    Explanation: ε = -N(dϕ/dt) = -1 * π * (0.05)² * 0.5 * 2 / 0.1 = 0.0785 V.