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NEET UG PHYSICS MCQ: ALTERNATING CURRENT
1
Medium
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Analyzing
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Assertion: With increase in frequency of an A.C supply, the impedance of an L-C-R series circuit, decreases at first, becomes minimum and then increases.
Reason: In L-C-R series circuit, impedance (z)
.
Reason: In L-C-R series circuit, impedance (z)
.
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Correct option: A
If both assertion and reason are true and the reason is the correct explanation of the assertion.
Option A is correct because both the assertion and the reason are true, and the reason correctly explains the assertion. The impedance of an L-C-R series circuit decreases, reaches a minimum at resonance, and then increases as frequency increases. The impedance formula explains this behavior.
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