1 / 10

Work in Electrical Systems

Work in Electrical Systems. Notes 2.3.

wsherrell
Download Presentation

Work in Electrical Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Work in Electrical Systems Notes 2.3

  2. Forces are applied to charged objects by electric fields—electric fields are created by other charges. You can’t see or hear electrical work, you can only see the results of the work because it is converted into other forms of energy such as rotation, light, sound, and heat.

  3. I. Coulombs A. 1 electron = 1.6 x 10-19 C B. 1 C = charge of 6.25 x 1018 electrons C. the net charge of 1 coulomb = 6.25 billion billion • electrons on the bottom plate of a capacitor rather than on the top plate.

  4. II. Work in Electrical Systems A. E = FE/q (electric field equals force divided by charge) B. When a charge is moved in an electric field, work is done. C. ΔV = E x d (change in voltage equals electric field times distance moved)

  5. D. W = ΔV x q (Work equals change in voltage times charge)—electrical work is the product of potential difference and charge moved. E. 1V = 1 J/C ( One Volt = 1 Joule per Coulomb) F. vectors point away from the positive charge and toward the negative charge—work can be positive or negative

  6. III. Electric Charge and Current A. 1A = 1C/s ( One Ampere equals one Coulomb per second) B. I = q/Δt (Current equals charge divided by change in time) C. 1C = 1 A∙s (1 Coulomb equals 1 ampere∙second) D. 1 ampere∙hour = 3600 coulombs

  7. IV. Effects of Electrical Work A. movement B. thermal energy C. light D. sound

  8. V. Efficiency of Electrical Devices A. E = ow/iw B. Not all electrical work is converted into mechanical work; therefore, no electrical device can ever be 100% efficient.

  9. VI. Why Use Electricity to Do Work? A. Produced by: 1. burning coal, gas, or oil to produce thermal energy 2. thermal energy converts water into high-pressure steam 3. steam pressure is used to drive turbines 4. turbines drive electrical generators to produce electricity

  10. B. Reasons for using electricity: 1. affordable 2. can move over long distances through overhead or underground wires 3. can be transformed into other forms of energy and work 4. convenient and easy to use

More Related