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At very high frequencies, the parallel RL circuit behaves as

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At very high frequencies, the parallel RL circuit behaves as
  • AA pure inductive circuit
  • BAn LC circuit
  • CA pure capacitive circuit
  • DA pure resistive circuit
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Inductive reactance is $({X_L} = 2\pi fL)$

At very high frequencies, inductive reactance will be infinity and it acts as an open circuit.

Hence parallel RL circuit at this condition becomes pure resistive circuit.