Unformatted text preview: 1I 2 ) = 1.75A The equivalent circuit is two 2 Ω resistors in parallel (equivalent to a single 1 Ω resistor) driven by a 1.75A source: the voltage developed is (I 1I 2 )R eq = 1.75V, positive at the top. The 3A source is driving current upwards in potential, so must supply P = iV = 3A x 1.75V = 5.25W. The 1.25A source is driving current to a lower potential, so absorbs power. The power it supplies is P = iV = 1.25A x (1.75V) = 2.1875W Your answer can be expressed as a product, in case you didn’t have a calculator....
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 Winter '10
 xiejiang
 Resistor, Series and parallel circuits, Current Sources

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