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Network TheoryAC Circuit Analysis

In a purely inductive AC circuit, current ideally?

  • ALeads voltage by 90 degrees
  • BLags voltage by 90 degrees
  • CIs in phase with voltage
  • DLags voltage by 180 degrees
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Correct Answer: B. Lags voltage by 90 degrees
Explanation: For an ideal inductor, voltage leads current by 90 degrees; equivalently, current lags voltage by 90 degrees.
Reference: Standard network theory: ac circuit analysis
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