alleryElectromagnetic induction is best described as the:
ACharging of an electric conductor by rubbing or friction
BProduction of a magnetic field by a current flowing in a coil
CGeneration of a current in a coil by relative motion of a magnet
DRotation of a coil around its axle inside an electric motor
Answer & Solution
Correct answer: C. Generation of a current in a coil by relative motion of a magnet
1. Faraday showed in 1831 that a moving magnet can produce a current in a conductor.
2. The chapter defines induction as the generation of a current in a coil due to relative motion between the coil and the magnet, i.e. a change in the magnetic lines through the coil.
3. The option describes the magnetic effect of a current, which is the reverse phenomenon, so it is rejected.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 4 "Effects of Electric Current", p.69_
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