Find resistor currents using KVL.

Solution:

and are parallel. So the voltage across is equal to . This can be also calculated using KVL in the left hand side loop:

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Find resistor currents using KVL.

Solution:

and are parallel. So the voltage across is equal to . This can be also calculated using KVL in the left hand side loop:

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Determine the power of and . (Hint: there is no need to use nodal analysis; voltages between nodes can be easily found by the voltage sources.)

**Solution**

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Solve the circuit by nodal analysis and find .

**Solution**

a) Choose a reference node, label node voltages:

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