Transistor Fundamentals: Collector Saturation and Collector-Emitter Cutoff

By Patrick Hoppe

Students read about the concepts of saturation and cutoff. They view diagrams that illustrate the interaction of the load line and the family of curves.

Operation of Full-Wave Bridge Rectifier

By Matthew Treu

In this learning activity you'll explore the operation of a full-wave bridge rectifier circuit.

Waveforms of a Triac Circuit

By Terry Bartelt

Learners observe the waveforms in a circuit in which a triac controls the brightness of a lampâ€™s light. A brief quiz completes the activity.

How Current Requires Voltage

This learning activity uses a water pressure analogy to present the concept that voltage pressure is required to cause current flow.

Apparent Power

Learners read an explanation of the concept of apparent power in a power distribution system involving motors, generators, and transformers. A quiz completes this interactive lesson.

Voltage Waveforms in an Edison Three-Wire System

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

Ammeter Circuit Connections

In this animated activity, students view a step-by-step approach of how to connect an ammeter to a circuit. A brief quiz concludes the lesson.

Analog Voltmeter Operation

Students follow the procedure to measure voltage with an analog voltmeter. They examine the use of the Function Switch and the Range Switch. A brief quiz completes the activity.

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.

Op Amp Fundamentals: The Operational Amplifier

Students read about the characteristics of the ideal operational amplifier and compare them with the industry standard LM741C.

Waveforms of an SCR Circuit

Learners view waveforms at various locations of an SCR circuit controlling the intensity a light bulb. The waveforms are shown when the light is dim, at medium brightness, and at full brightness. A brief quiz completes the activity.

Oscilloscope Phase Shift Measurements (Screencast)

In this animated lesson, learners follow the steps required to read the phase shift difference in degrees between two AC waveforms.

Series-Parallel Circuit Analysis: Practice Problems Circuit 1

In this interactive object, learners analyze a series-parallel DC circuit problem in a series of steps. Immediate feedback is provided.

Parallel Circuit Analysis Practice Problems: Circuit #10

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.

Motor Loading

Students view a graphical explanation of how the motor condition (unloaded, 50 percent loaded, fully loaded) affects the phase between voltage and current, the current draw from the AC supply, the amount of power consumed, and the power factor.

The Flip-Flop

In this animated activity, learners view the flip-flop and read about its outputs, the information it stores, and its storage conditions. A quiz completes the lesson.

Transistor Fundamentals: AC Models

Students read about the four steps to creating an ac model and view examples.

The Transistor Symbol

In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.

Inductance

This learning activity describes the physical properties that affect the inductance, in henries, of an inductor.

Inductors (Description and Examples)

Learners read a description of inductors and view examples of inductors in series and in parallel.

Conductors, Insulators and Resistors

In this animated activity, learners examine why various materials are conductors, insulators, or resistors of current. A short quiz completes the learning object.

Watt's Law

In this animated object, students examine the concept of wattage dissipation and the three Watt's Law formulas.

Thermistor Temperature Alarm Circuits

In this animated object, learners examine the operation of a temperature alarm circuit that uses a thermistor in a Wheatstone Bridge.

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.

Ignition System of a Combustion Engine

Students view the parts and movements of a combustion engine in this animated activity. Each part is described.