In a DC resistive network, maximum power is transferred to a variable load RL from a Thevenin source when?

  • ARL=0
  • BRL=Rth
  • CRL=2Rth
  • DRL tends to infinity
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Correct Answer: B. RL=Rth
Explanation: For a purely resistive Thevenin equivalent, load power is maximum when the load resistance equals the Thevenin resistance.
Reference: Standard network theory: maximum power transfer
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