An electric circuit that includes a voltage source E with an internal resistance r, and a load resistance R is shown in the figure.

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John Doe
John Doe 2021-11-5
编辑： Pat Gipper 2021-11-22
An electric circuit that includes a voltage source E with an internal resistance r, and a load resistance R is shown in the figure. Plot the power P as a function of R for 1<R<10 given that E = 12V and r = 2.5. Prove that maximum power transfer will occur when the internal resistance r and load resistance R are equal.
I don't really get what's going on with this problem, our professor didn't give us a figure compare to what is stated in the problem.

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Pat Gipper
Pat Gipper 2021-11-22
编辑：Pat Gipper 2021-11-22
Probably late for your homework assignment. Can you write the equation for the power dissipated in R leaving R as a variable? Don't you remember how to find the minimum or maximum of a function from calculus?

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