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Discussion

A two branch parallel circuit has a 20 Ω resistance and 1 H inductance in one branch and a 100 μF capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is

  • A.500 Ω
  • B.50 Ω
  • C.
    20 Ω
  • D.5 Ω

Answer: A

At parallel resonance circuit impedance = .

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