PPE01_Charge

# PPE01_Charge - Electric Fields Charge RHJansen RHJansen...

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© RHJansen Field Forces Electricity, like gravity and magnetism, is a field force. Field forces can cause cause action at a distance. Masses attract each other by gravitational force Charges attract and repel by electric force . And as we shall see later, moving charges become magnetic and attract and repel one another with the magnetic force . We will many similarities between electricity and gravity. As a result, electricity will be compared to gravity. © RHJansen
© RHJansen Particles of Charge Proton: positively charged particle. Electron: negatively charged particle. Neutron: a neutral particle that has no electrical properties. Variables for Charge e used for the smallest charged particle, the e lectron 1 e = 1.6 × 10 −19 Coulombs (the units of charge) All charge in the universe is a multiple of this charge. This is also the charge of a proton. q a small amount of charge, often a point charge or a spherical object containing charge. Q a large amount of charge, often the charge of parallel plates. © RHJansen

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© RHJansen Charge Unit of charge: Coulombs ( C ) Charge on an electron: 1 e = 1.6 × 10 −19 C Charge on a proton: 1 e = 1.6 × 10 −19 C Charge on a neutron: zero Number of charges in 1 Coulomb: 6.25 × 10 18 charged particles Not given, but easy to find: It is the reciprocal of 1.6 × 10 −19 Attraction and Repulsion Like charges repel Opposite charges attract Neutrons have no effect © RHJansen
© RHJansen Conserved Charge cannot be created or destroyed The number of protons, electrons, and neutrons will not change (until we get to Modern Physics) The questions in this chapter will be where are the charges and

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## This note was uploaded on 07/21/2009 for the course PHYSICS 7B taught by Professor Packard during the Spring '08 term at Berkeley.

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PPE01_Charge - Electric Fields Charge RHJansen RHJansen...

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