In this animated lesson, students view how an oscilloscope and a DC voltmeter measure the voltage of a half-wave rectifier.

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

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

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

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 explain how voltage and resistance in a series circuit affect current flow.

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

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

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.

Learners examine the function of the analog wattmeter to measure true power, how it is connected in a circuit, and how the internal components develop a measurement. A brief quiz completes the activity.

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

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.

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 study an animation that shows how a battery charge reduces over time and when varying resistance values are placed in a series circuit. Ten review questions complete the activity.

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

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

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.

Instructions on how to wire an integrated circuit are given.

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.