Students work six practice problems to determine the total impedance of a parallel circuit.

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

Students view the keystrokes of a TI-30XIIS calculator that are required to solve for the instantaneous current of an energizing RL circuit.

Learners examine the counter-reset function of a programmable controller and how it is used.

In this teaching and learning aid, the user can alter circuit variables and view how these changes affect circuit voltage, current, reactance, impedance, and phase angle.

Learners alter circuit variables and view how these changes affect circuit voltage, current, reactance, impedance, and phase angle.

Students solve problems on the determination of total capacitive reactance of series-parallel capacitors.

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 descriptions of the voltage, current, and turns ratios of the primary and secondary coils for a transformer in this interactive lesson.

You'll practice solving problems using the rule for multiplying powers with the same base.