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प्रश्न
What can produce an electric current in a closed coil?
पर्याय
A continuously pressed key with no change in current
A stationary magnet with no changing magnetic flux
A steady magnetic field with both coils stationary
A time-varying magnetic field
MCQ
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उत्तर
A closed coil can have an induced electric current when it is subjected to a time-varying magnetic field. Induction occurs when the magnetic flux through the coil changes.
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