alleryIn a circuit containing a capacitor, the current does what relative to the voltage?
AIt links across
BIt leans around
CIt leads ahead
DIt lags behind
Answer & Solution
Correct answer: C. It leads ahead
1. A capacitor must charge before a voltage appears across it.
2. So current flows before the voltage reaches its peak.
3. In the case of a capacitor, the current leads the voltage by pi over two.
4. So the current leads ahead.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_
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