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Current, Power and Total Power

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See the attached file.
For the circuit shown in Figure 2.24 (attached file), find:
a) The currents i1 and i2.
b) The power delivered by the 3-A current source and by the 12-V voltage source.
c) The total power dissipated by the circuit.

Let R1=25 ohms, R2= 10 ohms, R3= 5 ohms, R4= 7 ohms, and express i1 and i2 as functions of v. (Hint: Apply KCL at the node between R1 and R3).

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Solution attached a .doc that shows how to find the total power dissipated and delivered as well as two current values on the given circuit diagram.

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