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.

AC Current Flow

By Terry Bartelt

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.

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.

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 Generation of Alternating Current

This learning object describes the production of an alternating current in a generator with a single-loop armature. An illustration of how a sine wave is produced is shown through animation.

AC Voltage Conversions

In this animated object, learners examine the formulas used to convert peak, RMS, average, and peak-to-peak AC voltages. A brief quiz completes the activity.

The Electrostatic Charge of a Capacitor

In this animated activity, learners examine the conversion of electrical energy into an electrostatic charge within the dielectric material of a capacitor.

Transformer Practice Problems

By Patrick Hoppe

Students solve practice problems on voltage, current, and impedance matching. Examples precede the problems.

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.

Inductance

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

Transfer Functions: The RC High Pass Filter

Learners read how the transfer function for a RC 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.

Voltages Across Series and Parallel Capacitive Circuits

In this interactive and animated object, learners examine how dc voltages develop across capacitors that are connected in series and in parallel.

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.

Series RL Circuit Vector and Circuit Analyzer

By James Bourassa, John Rosz

Learners alter circuit variables and view how these changes affect circuit voltage, current, reactance, impedance, and phase angle.

An Impedance Matching Application

Learners consider why an impedance matching transformer is needed to connect an antenna to a television.

Inductive Reactance Demonstration 1

Learners view video clips showing how coiled wire provides more resistance to AC current flow than uncoiled wire.

Impedance Matching

Learners examine the impedance matching capability of a transformer and how to select the proper turns ratio to achieve this function. A brief quiz completes the activity.

The Vertical Portion of the Sine Wave

In this animated lesson, learners examine sine waves and alternating current. A brief quiz completes the object.

Energizing Time Constants of an RL Circuit

In this animated object, students view an explanation of how current, voltage, and the magnetic field strength of a series RL circuit change during five time constants. A brief quiz completes the activity.

Reactive Power

Students read an explanation of reactive power in a power distribution system involving motors, generators and transformers. A brief quiz completes the activity.

Oscilloscope: DC Voltage Measurements

Learners follow step-by-step instructions for using an oscilloscope to measure DC voltages.

Phase Relationships Between Line-Neutral and Line-Line Voltages

By Michael Gradinjan, Terry Fleischman

Learners view a demonstration showing that line-neutral voltages and line-line voltages are not in-phase with each other, but have a definite 30-degree relationship.

Op Amps 2: The Non-Inverting Amplifier

By Todd Van De Hey

The learner will describe the non-inverting op-amp configuration and calculate the circuit gain.

Op Amps 3: The Inverting Amplifier

Describe the inverting op-amp configuration and calculate the circuit gain.