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Network TheoryMaximum Power Transfer

A Thevenin equivalent has Vth=20 V and Rth=5 ohm. The maximum power available to a resistive load is?

  • A5 W
  • B10 W
  • C20 W
  • D80 W
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Correct Answer: C. 20 W
Explanation: Pmax=Vth^2/(4Rth)=400/(20)=20 W.
Reference: Standard network theory: maximum power numerical
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