S09P1BLec15B

# S09P1BLec15B - Physics 1B Lecture 15B"Electricity is...

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Physics 1B Lecture 15B "Electricity is actually made up of extremely tiny particles called electrons, that you cannot see with the naked eye unless you have been drinking." --Dave Barry

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Administrativa We would like to know if this book can help you more than your current book. Use Chapter 16 from this book as an additional resource for the next two weeks and let us know on April 13th what you think.
Electrical Charge How would you describe what mass is to your grandmother? Charge is defned in a similar manner to mass. Charge is something an object inherently has (like mass). Be careFul!!!! Many homework problems have statements like “a charge oF 4.5 μ C.” They really mean to say “a small point particle has a charge oF 4.5 μ C.” They are just being lazy.

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Electrical Charge Two types of charge exist in nature: positive and negative. They were named for Benjamin Franklin (we can blame him later). Like charges repel one another. Unlike charges attract one another. Many subatomic objects can carry positive charge: protons, pions, positrons, quarks. Many subatomic objects can carry negative charge: electrons, pions, anti-protons, quarks.
Electrical Charge In the early 1900’s, Robert Millikan performed an experiment that showed that all charge is a multiple of one fundamental unit. This fundamental unit was the charge of the

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S09P1BLec15B - Physics 1B Lecture 15B"Electricity is...

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