# AC, DC Circuits, Voltmeter

Credit: 5 PDH Hours
Course Fee: \$75.00
25 pages

### How it Work!

1. Register first and log into your account. Study and take the quiz for FREE until passed.
2. After passing the quiz, follow the page, pay for the course and print your certificate.
This PDH or CE course discusses the rules and equations for DC circuits apply to AC circuits only when the circuits contain resistance alone, as in the case of lamps and heating elements. In order to use effective values of voltage and current in AC circuits, the effect of inductance and capacitance with resistance must be considered.

The combined effects of resistance, inductive reactance, and capacitive reactance make up the total opposition to current flow in an AC circuit. This total opposition is called impedance and is represented by the letter Z. The unit for the measurement of impedance is the ohm.

Resistance and reactance cannot be added directly, but they can be considered as two forces acting at right angles to each other. Thus, the relation between resistance, reactance, and impedance may be illustrated by a right triangle.

The voltmeter uses the same type of meter movement as the ammeter but employs a different circuit external to the meter movement.

#### Learning Objective:

The learning objective of this PDH or CE continuing education course was to give a general understanding of AC, DC circuits and Voltmeter.
Review the quiz before studying the course.

#### Course Content

Course Author: Franco F. Davati, P.E.

#### Certificate of completion of the course

This course comes with a multiple-choice quiz. You can view the quiz and take the quiz if you are logged in your account. You can take the quiz for this online PDH course as many times until passed. The passing grade is 70% and above. After you pass the quiz simply follow the page, to pay for the course and print your certificate instantly. A copy of the certificate and receipt for this course will always be in your account.

This online PDH course can also be used as a continuing education course for the following.

PE Mechanical Engineers

PE Electrical Engineers

CE Contractors