engineering physics MCQ #1244

A circular coil of radius 0.1 m is placed in a uniform magnetic field of 0.2 T. If it's rotated by 180° in 0.2 s, find induced emf.

engineering physics MCQ #1244

  1. Question 1

    Q1. A circular coil of radius 0.1 m is placed in a uniform magnetic field of 0.2 T. If it's rotated by 180° in 0.2 s, find induced emf.

    • A) 0.0628 V
    • B) 0.1256 V
    • C) 0.628 V
    • D) 1.256 V

    Answer: 0.0628 V

    Explanation: ε = -N(dϕ/dt) = -1 * π * (0.1)² * 0.2 * 2 / 0.2 = 0.1256 V.