How Current Requires Voltage
By Terry Bartelt
This learning activity uses a water pressure analogy to present the concept that voltage pressure is required to cause current flow.
Total Resistance in a Parallel Circuit
The learner will apply the three formulas used to find the total resistance of three types of parallel resistor circuit configurations.
Calculating Horsepower, RPM, and Torque
By James Bourassa, John Rosz
In this animated and interactive object, learners examine the formula for horsepower and work practice problems.
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.
What Is Electricity?
The learner studies how electrons travel from one atom to the next. Examples demonstrate how voltage is created by the use of a battery or through magnetism. A quiz completes the activity.
A Timer-Off Application
Learners examine how a PLC Timer-Off instruction is used in the operation of an automotive paint booth.
Transistor Fundamentals: Voltage-Divider Biased NPN Transistor
By Patrick Hoppe
Students view drawings of the dc analysis of a voltage-divider biased NPN transistor.
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.
Single-Phase Motors: Introduction to Phase-Splitting
By Terry Bartelt, Terry Fleischman
Learners will understand how the interaction of the armature magnetic field and the rotating stator field cause the rotor of a single-phase AC motor to turn.
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.
The 555 Astable Multivibrator
Learners observe the animated operation of an astable mulivibrator using a 555 IC (integrated circuit) chip and external components.
Voltage Divider Rule (VDR)
By Terry Fleischman, Patrick Hoppe
Students review the Voltage Divider Rule and work practice problems.
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 Induction Motor Slip
In this animated object, learners examine how the rotation of an induction AC motor's armature slips behind the synchronous rotational speed of the stator's field to create magnetic fields. These fields interact and produce torque. A quiz completes the activity.
Analog Position Control
In this animated object, learners examine an analog closed-loop feedback system that uses potentiometers to control the position of a gear rack.
Difference Op Amp
Learners examine the fundamental operation of a difference operational amplifier. A brief quiz completes the activity.
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.
Active Region Operation of a Transistor
Learners view the operation of an NPN transistor in the active region.
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.
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.
This learning activity describes the physical properties that affect the inductance, in henries, of an inductor.
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.
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.
Maximum Power Transfer
Learners are introduced to the maximum power transfer theorem. Examples show the load as it varies and the results are graphed.