Determine the power of each source.

a)

b)

**Solution**

a) The current source keeps the current of the loop and the voltage source keeps the voltage across the current source as shown below.

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# Category Archives: Basic Concepts

# Problem 1-14: Current of A Voltage Source

Find the current passing through the voltage source:

a)

b)

**Solution**

a) The voltage source is in series with the current source. Since by definition a current source keeps the current passing through itself constant and the voltage source is in series with the current source, it should have the same current .

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# Problem 1-13: Voltage of A Current Source

Find voltages across the current sources.

a)

b)

c)

d)

e)

**Solution**

In each case, the current source is parallel with a voltage source. Therefore, the voltage across the current source is equal to the voltage of the voltage source, regardless of other elements.

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# Problem 1-4: Elements, Nodes, Loops and Branches

How many elements / nodes / loops / branches does the following circuit have?

**Solution**

8 elements

6 nodes, as shown:

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# Problem 1-3: Using Power and Conductance

Determine the resistance of the resistor, and .

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# Problem 1-2: Power and Conductance of Resistors

Determine the power absorbed by the resistors, the conductance of the resistors and .

# Problem 1-1: Power of Elements

Find the power of each element. Which one is supplying power and which one is absorbing it?

**Solution**

a) Passive sign convention, supplying power.

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