Question: A certain generator with an internal resistancer delivers a voltage E . This generator is connected to an electric circuit with a resistance R .

A certain generator with an internal resistancer delivers a voltage E. This generator is connected to an electric circuit with a resistance R. The work W done each second in sending a current through a circuit with resistance R is given by W = E ^2* R /((R + r)^2) For constant r and E, show that W is a maximum when Rr. Sketch a graph of W as a fiunction of R.

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