Kirchhoff?s Rules: Three currents have been labeled in the circuit below. Using these, determine the following: a) A relationship between these three currents [junction rule] b) 3 expressions, corresponding to the voltage change around each of the three loops: Upper, lower, outer [loop rule]. Express each in terms of the three currents (but do not use your result in (a) to simplify ? yet!) c) Express the voltage difference between points C and D (VCD) on the diagram (again, do not simplify the currents yet) d) Now ? solve for currents I1 ? I3 and VCD. Clearly state whether point C or D is at the higher potential.

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