alleryAt the resonant frequency of a series RLC circuit, the current amplitude is:
AMinimum
BMistaken
CMisplaced
DMaximum
Answer & Solution
Correct answer: D. Maximum
1. At resonance the two reactances cancel each other exactly.
2. Only the resistance is left to limit the current.
3. At resonant frequency the current amplitude is maximum.
4. It equals the voltage amplitude divided by the resistance.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_
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