This animated lesson shows the operation and characteristics of thru-beam optical sensors.
In this lesson on atomic structure, learners examine how the binding energy of electrons affects light production in certain phosphors used in x-rays.
Learners take a close look at the information on product labels concerning fat, fiber, and serving sizes. A quiz follows the lesson.
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.
This animated lesson shows the operation of timer-on and timer-off delay relays used in ladder circuit operate.