MDCAT Physics MCQ #772

A coil with an area of 0.05 m^2 is placed in a magnetic field of 0.3 T. If the coil is rotated by 90 degrees in 0.2 s, what is the average induced EMF?

MDCAT Physics MCQ #772

  1. Question 1

    Q1. A coil with an area of 0.05 m^2 is placed in a magnetic field of 0.3 T. If the coil is rotated by 90 degrees in 0.2 s, what is the average induced EMF?

    • A) 0.075 V
    • B) 0.15 V
    • C) 0.3 V
    • D) 0.6 V

    Answer: 0.075 V

    Explanation: Average induced EMF = (Initial flux - Final flux)/dt = (0.3*0.05 - 0)/0.2 = 0.075 V. Option B fails due to ignoring initial flux.