MDCAT Physics MCQ #869

A 2000-turn coil has a radius of 0.1 m. The magnetic field around it is 2 × 10^-2 T. What is the magnitude of the induced current?

MDCAT Physics MCQ #869

  1. Question 1

    Q1. A 2000-turn coil has a radius of 0.1 m. The magnetic field around it is 2 × 10^-2 T. What is the magnitude of the induced current?

    • A) 5 × 10^-6 A
    • B) 2 × 10^-5 A
    • C) 3 × 10^-3 A
    • D) 1 × 10^-4 A

    Answer: 3 × 10^-3 A

    Explanation: Using Faraday's law of induction. Induced EMF is 2 * pi * r^2 * B * N * (dΦ/dt). For 1 A, EMF is 3.14 * 0.1^2 * 2e-2 * 2000 * 1e-4 s^-1 = 6.28e-3 V.