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Thevenin equivalent circuit with a load

  1. Oct 27, 2009 #1
    1. The problem statement, all variables and given/known data
    Show that if a battery of fixed emf E and internal resistance R1 is connected to a variable external resistance R, the maximum power is delivered to the external resistor when R=R1

    2. Relevant equations
    Power = R * I^2

    3. The attempt at a solution
    We can think of problem as divide-by-two voltage divider and the power transferred to load is maximized when the load resistance is equal to the Thevenin resistance, but I don't know how to proceed.
  2. jcsd
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