## Solving a Simple Circuit of Three Elements

A simple circuit is solved and power absorbed or supplied by each element is determined. KCL as well as Ohm’s law are used in solving the circuit. positive sign convention is used in determining element powers. It is shown and discussed how a source, here current source, can be neither absorbing or supplying power. It is also mentioned that resistors are passive elements and always absorb power/energy.

## Circuit Containing Only Sources

We go through solving a circuit which only containes independent sources: two voltage sources and two current sources. KVL and KCL are used to determine voltages and currents.

## Solve Using Current Division Rule

A DC resistive circuit with two sources, one voltage source, one current source both independent solved using current division method.

## Mesh Analysis – Supermesh

The mesh analysis used to solve the circuit which has a supermesh. After solving the circuit, power of sources determined.

## Solve By Source Definitions, KCL and KVL

A DC resistive circuit consisting of one voltage source and one current source and three resistors is solved using source definition, KCL and KVL.

## Ideal Independent Sources

The ideal independent voltage and current sources are explained. Their symbols and voltage-current characteristics are presented. It is shown how their definitions can be used to solve problems. Some examples are also provided to clarify their characteristics.

## Problem 1-15: Power of Independent Sources

Determining power of independent voltage and current sources. Passive sign and active sign conventions are used to find out which source is supplyingpower and which one is absorbing.

## Problem 1-13: Voltage of A Current Source

Five circuits are considered to explain the characteristics of voltage and current sources. It is shown how voltage sources enforce their voltages on parallel elements.

## Problem 1-9: Power of a Current Source

A simple DC resistive circuit is solved by circuit reduction (for series and parallel resistors) and the power a current source calculated.

## Problem 1-8: Nodal Analysis – Power of Current Source

A simple DC resistive circuit with three resistors and two current sources are solved by the Nodal Analysis and power of one current source is determined.