Skills for solving circuit problems
Impedance matching A battery has an emf of 12 V and an internal resistance of 3 ?. (a) Determine the power delivered to a resistor R connected to the battery terminals for values of R equal to 1, 2, 3, 4, 5, and 6 ?. (b) Plot on a graph the calculated values of P versus the different values of R. Connect the points by a smooth curve. Confirm that the maximum power is delivered when R has the same resistance as the internal resistance of the power source (3 ? in this example).
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