Extra credit problems spring 2011
1. Set up mesh current equations.
Sketch the circuit showing the mesh current directions.
2. Set up node voltage equations.
Sketch the circuit showing the node voltage polarities.
3. Solve for the node voltages. Use an appropriate computer tool (e.g., Mathcad, Matlab, Maple, some
calculators, etc.).
See the instructor if you have questions about what is appropriate.
4. Calculate the power that each source produces, and calculate the power that the each resistor uses.
Check power balance: total source power production equals total resistor power use.
The sources may
represent DC generators that are converting mechanical energy to electrical form, while the resistors
are converting electrical energy to heat (or light and heat in the case of a lamp).
The smaller resistors
are representing the resistance of the wires used to connect the sources to the loads, and the larger
resistors are representing the loads.
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 Spring '11
 BRICE
 Volt, Resistor, Voltage drop

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