In this animated object, learners examine how to use a programmable logic controller as an alternative to hardwiring a ladder logic circuit.

In this animated object, learners examine the operation of up-counters and down-counters for a programmable controller. A brief quiz completes the activity.

Learners examine the circuitry in a DC variable speed drive that protects the rectifier diodes and motor windings from being damaged due to excessive current.

Students read information about basic logic gates including the gates' names, symbols, Boolean expressions, pronunciations, and truth tables. They then complete a matching exercise.

In this learning activity you'll apply the Pythagorean Theorem to isosceles and equilateral triangles.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

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.

Students read an explanation of "superposition" as a technique for ac circuit analysis. Complex numbers are used.

Students read how to determine the total impedance of a parallel circuit using complex numbers. The "J" term is used in the calculations.

Check POLARPEDIA.eu for answers. All the questions are polar and STEM related!