In this animated object, learners examine the mechanical configuration of a three-way switch and how it operates in a circuit. They also view diagrams showing the use of an ohmmeter to determine the electrical connections.

In this animated and interactive object, learners calculate the area and centroid of a rectangle.

Students observe the operation of a tri-state buffer used in digital electronics. A brief quiz completes the activity.

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

Learners follow step-by-step instructions for using an oscilloscope to measure DC voltages.

In this interactive object, students calculate capacitive reactance, phase angle, impedance, and power in series RC circuits.

Learners read a description of inductors and view examples of inductors in series and in parallel.

Learners read an explanation of the L/R time constant and examine the formula for calculating the instantaneous current value. The current is graphed as it climbs to maximum or drops to zero.

Students answer five questions concerning magnetism.