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A 4 ohm resistor dissipates 36 W. The magnitude of current through it is?

  • A1.5 A
  • B3 A
  • C6 A
  • D9 A
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Correct Answer: B. 3 A
Explanation: Using P=I^2R, I=sqrt(36/4)=3 A.
Reference: Standard network theory: resistor power numerical
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