alleryAt resonance in a series LCR circuit, the impedance is:
AMinimum
BMaximum
CInfinite
DNegative
Answer & Solution
Correct answer: A. Minimum
1. At resonance the two reactances become equal.
2. They cancel, leaving only the resistance.
3. So the impedance falls to its minimum value R.
4. The answer is minimum.
_Source: syllabus Physics, Ch 7 'Alternating Current'_
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