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Network TheoryMaximum Power Transfer

For an AC network with Thevenin impedance Zth=4+j3 ohm, maximum average power is transferred to the load when ZL equals?

  • A4+j3 ohm
  • B4-j3 ohm
  • C3-j4 ohm
  • D7 ohm
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Correct Answer: B. 4-j3 ohm
Explanation: Maximum average power transfer in AC occurs for conjugate matching: ZL=Zth*=4-j3 ohm.
Reference: Standard network theory: conjugate matching
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