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

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

Learners read how quality can be built into a manufacturing process.

In this learning activity you'll apply information about three different sources of governmental power: Unitary, Confederate, and Federal to world governments.

Learners examine the types and sources of credit that are available for operators of a farm or other agricultural business.

Students view information taken from various sources and decide if the material is acceptable for a technical research report. After choosing whether or not the source material is acceptable, the students read an explanation from the instructor.

By the end of this module, you’ll be able to:

- List four categories of disease agent sources

- Discover conditions when disease transmission is likely to occur

- Describe the means of disease transmission in a given situation

Learners view wire feed power sources ranging from 110-volt, single phase units to 460-volt, three-phase units. A description and photos of each are provided.

In this exercise, students read a list of sources used in a research report. They follow MLA guidelines to write parenthetical references and to compile a Works Cited page.

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

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

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

Students view the mathematical expression of an AC waveform with respect to time (t) and read about the different components of this expression.

Learners read the definitions of various water forms and locate the bodies of water on a map.

Learners read about the most common forms of financial statements including balance sheets, cash flow statements, and profit and loss statements. A brief quiz completes the activity.

Learners follow the steps for reducing all of the elements of a complex circuit to a single current source and a single source resistance to create a simple circuit. Several examples are given for dc circuits. The conversion between Thevenin and Norton is also presented.

Learners examine the 10 steps of the accounting cycle. The cycle begins with the analysis of source documents and ends with the post-closing trial balance and interpreting the financial information.

In this learning activity you'll identify acceptable paraphrases of source material.

Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.

Learners solve 14 problems related to voltage, current and power in a single source, six-resistor circuit. A help screen is provided.