The Zener Diode 2
By Terry Bartelt
In this animated object, learners examine the operation of a zener diode in the forward and reverse bias conditions. A quiz completes the activity.
The Binary-Coded Decimal
By John Casey, Terry Bartelt
Learners are introduced to the binary-coded decimal, a common way of encoding decimal digits in computing and electronic systems. A brief quiz completes the activity.
Volts per Hertz Ratio in AC Drives
Learners view an animated explanation of why an adjustment of the output voltage by an AC drive is required to maintain a constant torque as the frequency is varied.
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.
Voltage Drops in a Series Circuit
Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.
Parallel Circuit Analysis Practice Problems Part 1
By Patrick Hoppe
In this interactive object, students work parallel circuit analysis problems. They solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.
Series-Parallel Circuit Analysis Practice Problems: Circuit 2
In this interactive object, learners solve a series-parallel DC circuit analysis problem. Immediate step-by-step feedback is given.
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.
Conductive Probe Sensors
In this animated object, learners study how conductive probe sensors are used to measure conductive liquid in a container.
Who Wants to Be an "Engin-aire?" -- Ferrous Metals and Alloys
By Bryan LaVigne
Learners answer questions about ferrous metals and alloys using a game show format. Immediate feedback is provided.
Calibrating an Opposed Optical Sensor
In this animated and interactive object, learners follow three steps to calibrate an opposed optical sensor. They consider horizontal alignment, the sensitivity setting, and having an effective beam.
AC Voltage Conversions (Screencast)
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.
Weight- Volume Relationships: Saturated Density (Metric)
By Steve Whitmoyer
Students read how to determine and calculate the saturated density for a given sample of soil or aggregate, based on the mass-volume relationship. Practice problems complete the activity.
Resistor Color Code Recognition Drills
By James Bourassa, John Rosz
In this interactive object, students complete progressively more difficult exercises as a way to improve their ability to recognize resistor color code values.
Gradation - Calculations
This learning object introduces the student to the calculations involved in a sieve analysis -- including percentage retained and percentage passed.
Digital Terrain Model: Extrapolation of Elevations
Students read how to determine the elevation of an alignment or cross section where it crosses the TIN.
Op Amp Fundamentals: The Operational Amplifier
Students read about the characteristics of the ideal operational amplifier and compare them with the industry standard LM741C.
The Frequency of an AC Generator
By Walter Hedges, Terry Bartelt
Learners study the factors that determine the frequency of an AC generator, such as the rotational speed of the armature or the number of stator poles.
DC/AC I: Unit 8 Sample Exam
Students answer five questions concerning magnetism.
Inductors
This learning activity describes the abilities of an inductor coil to oppose alternating current and to pass direct current.
Oscilloscope AC Voltage Measurements
In this animated learning object, students view the operation of an oscilloscope that is used to measure AC voltages. A brief quiz completes the activity.
Weight-Volume Relationships: Saturated Unit Weight
Students read how to determine and calculate the saturated unit weight for a given sample of soil or aggregate, based on the weight-volume relationship. Practice problems complete the activity.
The Broadband Telco Services Subscriber Loop
By dan.schullo
Walk through the subscriber loop and learn how the signal travels from the central office to the subscriber.
Power Law: The Relationship of Voltage, Current, and Watts
Learners examine three formulas than can be used to find dc power. Examples are given.
A Timer-Off Application
Learners examine how a PLC Timer-Off instruction is used in the operation of an automotive paint booth.