Students read about the three main classes of amplifiers and view graphical representations of the collector current and circuit.

In this animated and interactive object, learners calculate the area and centroid of a quadrant.

Learners view animations showing how a time-of-flight flowmeter uses ultrasonic sound waves to measure the flow of a liquid.

In this interactive and animated object, learners examine the operation of a semiconductor diode when it is forward and reverse biased. A brief quiz completes the activity.

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

In this animated object, learners examine cycles, frequency, Hertz, wavelengths, and periods. A brief quiz completes the activity.

In this animated activity, learners examine the difference between opens and shorts in an electrical circuit. A brief quiz completes the object.

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

In this interactive object, learners work 12 problems dealing with dc circuit analysis.

In this learning activity, you'll practice converting between common decimal and fraction equivalents in US standard units.

You'll learn to identify nondestructive examination abbreviations and they use in examination symbols.

You'll practice converting between units of measure for area in the English Measurement System.