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Currents are induced in closed coils by changing:
AMagnetic figures
BMagnetic filings
CMagnetic fields
DMagnetic fluids
Answer & Solution
Correct answer: C. Magnetic fields
1. The coils themselves need not move.
2. Currents were induced in closed coils subjected to changing magnetic fields.
3. So the correct answer is magnetic fields.
_Source: NCERT Class 12 Physics Part I, Ch 6 'Electromagnetic Induction'_
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