In this learning activity you'll discover how perception of size is influenced by what's surrounding an image.

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

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.

In this animated object, learners study how the internal parts of an AC synchronous motor interact with magnetic fields to cause rotation. A short quiz completes the activity.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

In this interactive object, part 3 in a series, learners follow the steps of the “mathemagician” to examine four numerical curiosities: What’s Special About 1089, Perfect Squares: 1089 and 9801, The Mathematical Significance of 1776, and The Calculator Number Game. The learner will also study six number patterns and look at one remarkable table. Immediate feedback is provided.

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

In this interactive object, learners follow steps to find phase voltages in a partial three-phase power distribution circuit.

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

The learner views the operation of a transistor switching from saturation to cutoff. A brief quiz completes the activity.

In this learning activity you'll discover how visual perception is influenced by what's surrounding an image.

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

Learners read a general description of the function and structure of leaves and examine drawings and microscopic views. A matching exercise completes the learning object.

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.

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

In this animated object, learners examine the design of a ladder circuit that provides manual control to a water pumping system. Students also study modifications to the circuit as the complexity of the system increases.

Students learn how to predict how circuits will respond to varying frequency. They solve for the magnitude and phase angles.

In this learning activity you'll discover how visual perception is influenced by what's surrounding the image.

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.