Series-Parallel DC Circuits Analysis

By Patrick Hoppe

Learners follow a methodical approach for the dc analysis of series-parallel circuits.

Current in a Series Circuit

By Terry Bartelt

In this learning activity you'll determine what happens to current flow in a series circuit when the resistance is changed.

The Superposition Theorem

The superposition theorem is explained as it relates to dc circuit analysis. Examples are given.

The Triac

Learners study the fundamental operation of a triac, particularly how it is turned on and off. A brief quiz completes the activity.

Shorts Affecting Current in a Series Circuit

In this learning activity you'll review how a short affects current flow and voltage in a series circuit.

The Magnetron Ignition System

Learners read an explanation of how the Magnetron Ignition System uses a solid state switching component, a step-up transformer, and magnetism to provide a high voltage spark in a one-cylinder combustion engine.

Calculating DC Values of a Transistor Amplifier

In this animated activity, learners view the seven steps that are used to calculate voltage and current values throughout a common-emitter transistor amplifier.

Total Impedance of a Parallel Circuit Using Complex Numbers

Students read how to determine the total impedance of a parallel circuit using complex numbers. The "J" term is used in the calculations.

The Edison Wire System

Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.

The Time Proportioning Operational Amplifier (Screencast)

In this animated object, learners see how a time proportioning operational amplifier varies an average DC voltage. A brief quiz completes the activity.

Active Region Operation of a Transistor

Learners view the operation of an NPN transistor in the active region.

Discharging Time Constants of an RC Circuit (Screencast)

In this animated object, learners examine how current, voltage and the discharging capacitor of a series RC changes during 5 time constants. A brief quiz completes the activity.

AC Capacitor: A Water Tank Analogy

By Roger Brown

In this animated lesson, students read an analogy comparing water in a "special" water tank to the current "flow" through a capacitor.

Karnaugh Maps

Learners examine the Karnaugh map for a three-variable system. Several examples are given.

Effects of a Rheostat in a Series Circuit

In this animated object, learners examine how the way in which a rheostat is connected in series with other resistors causes current and voltage to change as the resistance is varied. A brief quiz completes the activity.

Transfer Functions: The RL High Pass Filter

Learners read how the RL high pass filter is developed. The transfer function is used in Excel to graph the Vout. The circuit is also simulated in Electronic WorkBench and the resulting Bode plot is compared to the graph from Excel.

Opens Affecting Current in a Series Circuit

In this learning activity you'll review how an open in a series circuit affects current.

Inductors

This learning activity describes the abilities of an inductor coil to oppose alternating current and to pass direct current.

AC Current Flow

In this interactive and animated object, learners examine the flow of electron current into and out of hot and neutral sockets during each alternation of an AC waveform. A brief quiz completes the activity.

Voltage and Current Amplitudes in a Series RLC Circuit

Learners examine how voltages and currents vary in a series RLC circuit as the applied frequency changes.

Transfer Functions: The RL Low Pass Filter

Learners read how the transfer function for a RC low pass filter is developed. The transfer function is used in Excel to graph the Vout. The circuit is also simulated in Electronic WorkBench and the resulting Bode plot is compared to the graph from Excel.

Voltage Sources in Series

In this learning activity you'll explore the effect of connecting voltage sources in series to increase voltage applied to a load.

Methods of Producing Electricity

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

Norton's Theorem

Learners follow the steps for reducing all of the elements of a complex circuit to a single current source and a single source resistance to create a simple circuit. Several examples are given for dc circuits. The conversion between Thevenin and Norton is also presented.

Fundamentals of a DC Motor

Learners study the interaction between the conductors of the stator and the armature inside a DC motor, which causes the shaft to rotate. A short quiz completes the activity.