Calculating DC Values of a Transistor Amplifier

By Terry Bartelt

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

The Superposition Theorem

By Patrick Hoppe

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

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.

Parallel Circuit Analysis Practice Problems: Circuit #5

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

Series-Parallel DC Circuits Analysis

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

Series-Parallel Circuit Analysis Practice Problems: Circuit #5

Learners examine a series-parallel circuit and solve 14 problems related to voltage, current, and power. A help screen is provided.

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.

Series Circuit Analysis Practice Problems Part 1

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.

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.

The Triac

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

Abbreviations Representing Electrical Quantities

In this learning activity you'll identify abbreviations that represent quantities associated with electrical circuits.

Synchronous & Asynchronous Inputs on a JK Flip-Flop

Students examine the operation of synchronous and asynchronous inputs on a JK Flip-Flop.

Thevenin Voltage: Practice Problems

Students work five practice problems to determine the Thevenin voltage of DC circuits.

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.

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.

Selecting a Proper Single Phase Transformer

By Gary Lindell, Terry Bartelt

Students follow the steps that are required to select a transformer with the proper ratings. Voltage, frequency, current, and KVA are considered.

The DC Shunt Motor

Learners examine the operation of a DC Shunt motor and its characteristics. A quiz completes the activity.

Total Resistance of a Series Circuit

In this learning activity you'll review the process of solving for the total resistance in a series DC circuit.

AC Voltage Conversion Problems

By John Rosz, Terry Bartelt

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Diode Approximations

This learning object introduces the three approximations of a diode.

Transistor DC Analysis Practice Problems: Circuit #1

Learners analyze a base-biased npn transistor circuit. A "help" screen is available.

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.

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.

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.

Logic Symbols

The schematic symbols of logic gates used in digital circuits are shown.