ElectricityReview

12/15/00

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Table of Contents

ElectricityReview

elementary charge

Coulomb’s Law

Electric Field Lines:

Electric Potential

CurrentI = Coulomb/second = Ampere

Direct Current (DC)

Alternating Current (AC)

Alternating Current

If V = 120V, What is I? USE P = IV=> I = P/V

If V = 120V, What is I? USE P = IV=> I = P/V

Electric Bill:Cost to run for 1 hr @$.05 per 1 kw-hr ? Cost = Power x Time x Rate

Electric Bill:Cost to run for 1 hr @$.05 per 1 kw-hr ? Cost = Power x Time x Rate

QuestionWhat current would you draw if you were unfortunate to short-circuit a 120 V line with dry hands? Wet hands?Use Ohm’s Law! V = IR!

QuestionWhat current would you draw if you were unfortunate to short-circuit a 120 V line with dry hands? Wet hands?Use Ohm’s Law! V = IR!

Author: Lynda & Jack

Email: lwilliam@stars.sfsu.edu

Home Page: http://cannon.sfsu.edu/~lwilliam