Learners use the National Electrical Code to determine the size of a motor overload protection device.

Students read an explanation of reactive power in a power distribution system involving motors, generators and transformers. A brief quiz completes the activity.

Students work practice problems in which the total resistance of the circuit is calculated. Feedback is provided.

In this interactive object, students calculate inductive reactance, impedance, current, and power in parallel RL circuits.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

The schematic symbols of logic gates used in digital circuits are shown.

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

Learners examine the fundamental concepts of sequencer output instruction. A simulated example shows a sequencer in operation.

In this animated activity, learners examine how various NAND gate configurations and the logic signals produced throughout the circuit perform the functions of all of the other types of logic gates.

Match the name of the item with the symbol

Use your knowledge of elements, mixtures, compounds, and chemical changes to beat the game!

Play this game to review possible questions for your quiz

Review of subatomic particles and elements.