alleryAlternating voltages are stepped up or down by means of:
ACapacitors
BResistances
CTransformers
DRectifiers
Answer & Solution
Correct answer: C. Transformers
1. Direct voltages cannot be changed this simply.
2. Alternating voltages can, which is why ac is used for supply.
3. The device that does it is the transformer.
4. So the answer is transformers.
_Source: syllabus Physics, Ch 7 'Alternating Current'_
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