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प्रश्न
Which group consists entirely of technologies that work on electromagnetic induction?
विकल्प
Generators, transformers, induction motors, and wireless chargers
Electric lights, trains, telephones, and personal computers
Trains, communication networks, magnetic compass needles, and conductors
Conductors, closed coils, solenoids, and magnetic compass needles
MCQ
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उत्तर
Generators, transformers, induction motors, and wireless chargers work on electromagnetic induction. In each case, the principle involves electric current produced by a changing magnetic field.
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