Professional Course

Basic Direct Current (DC) Theory

PDHengineer, Online
4 hours
119.80 USD
Next course start
Start anytime! See details
Self-paced Online
4 hours
119.80 USD
Next course start
Start anytime! See details
Self-paced Online
This provider usually responds within 48 hours 👍

Course description

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In Basic Direct Current (DC) Theory , you'll learn ...

  • Basic DC circuit calculations
  • The polarities and circuit direction associated with DC circuits
  • How to apply the laws governing DC circuits to DC circuit analysis
  • The various effects of DC circuit faults


Credit: 4 PDH

Length: 65 pages

Direct current or DC electricity is the continuous movement of electrons from an area of negative (-) charges to an area of positive (+) charges. A DC circuit is necessary to allow the current or stream of electrons to flow. Such a circuit consists of a source of electrical energy (such as a battery) and a conducting wire running from the positive end of the source to the negative terminal. DC circuits may be in series, parallel, or a combination. Understanding DC circuits is important for learning about the more complex AC circuits.

This course introduces the basic electricity and electrical circuit concepts associated with direct current. Topics include calculation of current, voltage, resistance, and power in series, parallel, and combination circuits with direct current power sources.

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Upcoming start dates

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  • Self-paced Online
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Who should attend?

Certificate of Completion

You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 20 questions. PDH credits are not awarded until the course is completed and quiz is passed.

Training content

This course teaches the following specific knowledge and skills:

  • How DC voltage is produced and what an electric circuit consists of
  • What a rectifier is and how half-wave bridge rectifiers differ from full-wave bridge rectifiers
  • What the difference is between a schematic diagram, one-line diagram, block diagram, and wiring diagram
  • What resistivity is and how temperature affects the resistance of materials
  • The difference between open circuit, close circuit, and short circuit
  • The identifying characteristics of a series, parallel, or combination circuit
  • How to calculate the current and voltage drop in series, parallel, or combination circuits
  • How to calculate the equivalent resistance for a series, parallel, or combination circuit
  • What is meant by the terms voltage divider and current division
  • How electron flow theory differs from conventional current theory


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