In this learning activity you'll review methods for testing an on/off switch with an ohmmeter and a voltmeter.

Learners study animated rheostat settings that show how varying the current flow affects the amount of power that is dissipated in a series circuit. Nine review questions complete the activity.

In this interactive object, learners determine the pulse width, period, duty cycle, and frequency of a waveform.

Learners analyze a base-biased npn transistor circuit. A "help" screen is available.

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

Instructions on how to interpret state indicator symbols for input and output terminals of digital devices is presented.

Students view the steps for determining the total capacitance for a series circuit. They then work practice problems.

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.

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

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

In this learning activity you'll review the steps for determining the total capacitance of a parallel circuit and work practice problems.

Learners examine the fundamentals of a pulse train. Concepts such as time on, time off, duty cycle, period, and frequency are covered.

Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.

Learners read a step-by-step approach on how to connect an ohmmeter when making measurements in this interactive lesson.

Learners examine first and second approximations and view examples of a "stiff" current source.

Learners examine the wiring of the primary components of the three types of DC motors, series, shunt, and compound. The operational characteristics of each type of motor are described. A quiz completes the activity.

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

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.

A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.

The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.

This learning object introduces the three approximations of a diode.

In this animated object, learners drag resistors of the proper value into a series circuit to cause a required amount of current to flow. Seven review questions complete the activity.

In this interactive object, learners determine the Vp, Vp-p, Vrms, Vavg, and the frequency of a sine wave that is displayed on an oscilloscope screen.

In this interactive object, learners work 10 problems covering resistors, voltage, and current.

Students read an explanation of the common-source and source-follower amplifiers. Gain formulas are developed and an example is given.