This animated lesson shows the operation of timer-on and timer-off delay relays used in ladder circuit operate.

Learners study factors that affect the synchronous speed of an AC motor: the applied AC frequency and the number of stator poles.

In this animated object, learners examine the types of information to enter, and the sequence of steps required, to program a programmable logic controller (PLC) timer.

In this animated and interactive object, learners follow two methods for converting a hexadecimal number to a decimal number. They test their knowledge in exercises at the end of the learning object.

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.

Learners observe animations showing how data is converted between serial and parallel flow.

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.

You'll practice calculating circuit gain and output voltage for the non-inverting amplifier.

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