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Question 20246
JEE Physics · Hard

Electromagnetic Induction and Alternating Current: Parallel LCR at Resonance MCQ

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Parallel LCR at ResonanceHardQuestion 20246

Question

In a parallel LCR circuit at resonance, the impedance is:
  1. A
    Minimum
  2. B
    Maximum
    Correct
  3. C
    Equal to R
  4. D
    Zero

Correct answer

Maximum

Explanation

In a parallel RLC circuit at resonance, the admittance Y = G (purely conductive) and the reactive admittances cancel → impedance Z = 1/Y is maximum (unlike series where it is minimum). The parallel circuit is sometimes called a 'tank circuit' and has minimum current from the source at resonance.

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