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Making a fomula to calculate the max power (electricity)

  1. Mar 28, 2016 #1
    1. The problem statement, all variables and given/known data
    Show how you can make a mathematic formula for maximum power, by using the other formulas.
    I think, that U is maybe called V in English.

    2. Relevant equations

    U= R*I
    Up = -ri *I+U0

    3. The attempt at a solution


    P= -ri·I2+U0 I

  2. jcsd
  3. Mar 28, 2016 #2


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    Staff: Mentor

    Hi Tqooa Ez,

    Welcome to Physics Forums!

    Can you give some more context to the problem? Is there a particular circuit involved? (I'm assuming that this is a circuit analysis problem given the names of the variables that you've mentioned). A circuit diagram would be welcomed.
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