Faraday's and Lenz's laws, motional EMF, self/mutual inductance, eddy currents.
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Q1 · Electromagnetic Induction · MEDIUM
A rectangular coil of 100 turns, each of area 0.05 m², rotates at 60 revolutions per second in a uniform magnetic field of 0.02 T. The axis of rotation is perpendicular to the magnetic field. What is the maximum emf induced in the coil?
Q2 · Electromagnetic Induction · EASY
A conducting rod of length l moves with velocity v perpendicular to a uniform magnetic field B. The rod, velocity, and field are mutually perpendicular. What is the magnitude of the induced EMF across the ends of the rod?
Q3 · Electromagnetic Induction · MEDIUM
A solenoid of length 50 cm has 500 turns and carries a current of 2 A. A coil of 100 turns and area 5 cm² is placed inside the solenoid with its axis parallel to the solenoid axis. If the current in the solenoid is reversed in 0.1 s, what is the magnitude of induced emf (in mV) in the coil? (Take μ₀ = 4π × 10⁻⁷ T·m/A)