MUET / Sukkur IBA Engineering Physics: Electromagnetic Induction MCQs

Practice Electromagnetic Induction MCQs for MUET / Sukkur IBA Engineering Physics — topic-wise sets with solved answers.

MUET / Sukkur IBA Engineering Physics: Electromagnetic Induction MCQs — sample questions

  1. Question 1

    Q1. A coil of 100 turns is rotated in a magnetic field, inducing an emf of 10 V. If rotation rate doubles, induced emf becomes

    • A) 5 V
    • B) 10 V
    • C) 20 V
    • D) 40 V

    Answer: 20 V

    Explanation: Induced emf is directly proportional to rate of change of flux, hence doubling rotation rate doubles induced emf.

  2. Question 2

    Q2. The magnetic flux linked with a coil is given by φ = 5t² + 2t + 3. Induced emf at t = 1 s is

    • A) 10 V
    • B) 12 V
    • C) 15 V
    • D) 20 V

    Answer: 12 V

    Explanation: Induced emf = -dφ/dt = -(10t + 2), at t = 1 s, emf = -12 V.

  3. Question 3

    Q3. A conducting rod of length 1 m moves with a velocity of 5 m/s in a magnetic field of 0.1 T. Induced emf is

    • A) 0.1 V
    • B) 0.5 V
    • C) 1 V
    • D) 5 V

    Answer: 0.5 V

    Explanation: Induced emf = Blv = 0.1 * 1 * 5 = 0.5 V.

  4. Question 4

    Q4. The self-inductance of a coil is 2 H. If current changes from 0 to 5 A in 1 / 2 s, induced emf is

    • A) 10 V
    • B) 20 V
    • C) 40 V
    • D) 80 V

    Answer: 20 V

    Explanation: Induced emf = -L(dI/dt) = -2 * (5 / 0.5) = -20 V.

  5. Question 5

    Q5. A coil of inductance 1 H and resistance 10 ohm is connected to a 10 V battery. Energy stored in the coil is

    • A) 0.1 J
    • B) 0.5 J
    • C) 1 J
    • D) 5 J

    Answer: 0.5 J

    Explanation: Energy stored = 1/2 * LI² = 1/2 * 1 * (10/10)² = 0.5 J.

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