Chapter 1 - BasicConcepts Chapter1 LearningObjectives...

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Basic Concepts Chapter 1
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Learning Objectives Charge Current and Voltage Energy and Power Ideal basic circuit element Passive sign convention
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Charge Fundamental electric quantity Unit: Coulomb (C) • Charge of an electron: q e = -1.602 x 10 -19 C Charge of a proton: -q e = +1.602 x 10 -19 C It takes many, many electrons to produce a meaningful amount of electric current.
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Charge is conserved. This is based on conservation of matter . Electrons and protons are neither be created nor destroyed in an electric circuit. They can only be transferred.
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Current Current (i) is the rate at which charge is  passing through an area  i =  q/ t where  i  = the current in Amperes q  = the charge in Coulombs t  = the time in seconds Ampere  = 1 Coulomb/second 1 Ampere =  6,240,000,000,000,000,000 electrons per sec (6.24 x 10 18 )
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Current is a Signed Quantity In electrical engineering, the positive 
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This note was uploaded on 06/06/2010 for the course E E 302 taught by Professor Mccann during the Spring '09 term at University of Texas at Austin.

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Chapter 1 - BasicConcepts Chapter1 LearningObjectives...

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