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.

Power and Energy Conservation

A circuit with two sources and three two port elements is studied. Some voltages and currents are given. Voltage of the voltage source is unknown. We need to analyze the circuit, find power of other elements and use the energy conservation to determine the power of the voltage source.

Mesh Analysis – Supermesh

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

Nodal Analysis – Dependent Current Source

Nodal analysis method is deployed to solve a four-node circuit which has a dependent current source. The target is to find the power of the controlled current source.

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 1-8: 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.

Problem 1-2: Power and Conductance of Resistors

Finding power and conductance of resistors from the current and resistance

Problem 1-1: Power of Elements

Finding the power of elements and determining which one is supplying power and which one is absorbing it.