In this animated and interactive object, learners examine how changes in applied voltage affect the current and voltages in a zener diode voltage regulation circuit. A short assessment completes the activity.

Instructions on how to wire an integrated circuit are given.

Students examine the four factors that affect resistance of a wire: temperature, length, diameter, and the type of material from which it is made. A short quiz completes the activity.

In this animated activity, students view how the Wheatstone bridge is used to activate a temperature alarm. A short quiz completes the lesson.

Students follow step-by-step directions on how to make mathematical calculations for a Wheatstone bridge.

Learners view waveforms at various locations of an SCR circuit controlling the intensity a light bulb. The waveforms are shown when the light is dim, at medium brightness, and at full brightness. A brief quiz completes the activity.

Learners observe the waveforms in a circuit in which a triac controls the brightness of a lamp’s light. A brief quiz completes the activity.

In this animated object, students examine the concept of wattage dissipation and the three Watt's Law formulas.

In this animated and interactive object, learners examine why the voltage produced by an AC drive must be increased when its frequency is increased due to inductive reactance.

Students read a step-by-step approach on how to connect a voltmeter to a circuit when making a measurement.

In this interactive and animated object, learners examine how dc voltages develop across capacitors that are connected in series and in parallel.

In this learning activity you'll explain how voltage and resistance in a series circuit affect current flow.

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

In this learning activity you'll explore the effect of connecting voltage sources in series to increase voltage applied to a load.

The effect of connecting voltage sources in parallel to increase amperage to a load is presented.

Students examine the first and second approximations of a voltage source. A "stiff" voltage source is defined, and several examples are given.

Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.

In this learning activity you'll determine the voltages that can be topped off of a multi-resistor voltage divider that has one main power source.

Students review the Voltage Divider Rule and work practice problems.

Learners examine how voltages and currents vary in a series RLC circuit as the applied frequency changes.

In this interactive object, learners examine how voltages and currents vary in a parallel LC circuit as the applied frequency changes.

In this learning activity you'll read the procedures for using the vertical function of an oscilloscope and view illustrations of waveforms.

Learners read about the vector diagram for a parallel RC circuit. This animated lesson presents information on current flow through each branch, total current, and phase angle.

In this animated activity, students read about the two general types of variable resistors: potentiometers and rheostats. They then answer six multiple-choice questions.

Students read about the concept of true power and view examples of how it is dissipated as heat is provided.