MHT CET 2023 Physics question

With increase in frequency of a.c. supply, the impedance of an L-C-R series circuit

(A)remains constant
(B)increases
(C)decreases
(D)decreases first, becomes minimum and then increasesCorrect

Answer: (D)

Solution

Impedance of a series LCR circuit: . At low frequency the capacitive reactance dominates and is large; as increases the net reactance decreases, so decreases. At

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Question ID VK-097990