alleryWhich device is essentially a generator producing AC?
AAlternator at a thermal power station
BA simple dry cell at room temperature
CA standard rooftop solar panel
DA typical lead-acid car battery
Answer & Solution
Correct answer: A. Alternator at a thermal power station
1. An AC generator uses electromagnetic induction with slip rings to output alternating current.
2. A power-station alternator has a rotating armature inside a magnetic field producing AC.
3. Dry cells and lead-acid batteries are electrochemical sources of DC.
4. A solar panel produces DC through the photovoltaic effect.
5. Only the alternator generates AC by induction.
6. So the alternator at a thermal power station is the right choice.
_Source: syllabus Science Ch 13 'Magnetic Effects of Electric Current' (learncbse.in extract)_
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