Faraday's and Lenz's laws, self and mutual inductance, AC generator, eddy currents.
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Q1 · Electromagnetic Induction (Class 12) · EASY
A circular coil of radius 10 cm and 20 turns is placed perpendicular to a uniform magnetic field. The magnetic field changes from 0.2 T to 0.6 T in 0.04 s. Calculate the magnitude of induced emf in the coil.
Q2 · Electromagnetic Induction (Class 12) · EASY
A conducting rod of length 0.5 m moves with a velocity of 10 m/s perpendicular to a magnetic field of 0.8 T. The rod, magnetic field, and velocity are mutually perpendicular. What is the induced emf between the ends of the rod?
Q3 · Electromagnetic Induction (Class 12) · MEDIUM
A square loop of side 20 cm is placed with its plane perpendicular to a magnetic field. The magnetic field varies with time as B = 0.5t² T, where t is in seconds. At t = 2 s, the magnitude of induced emf in the loop is:
Q4 · Electromagnetic Induction (Class 12) · MEDIUM
Two coils have mutual inductance of 0.02 H. The current in the first coil varies as I = 4 sin 100πt ampere. The maximum value of emf induced in the second coil is