The stars of Physics II today were E, the strength of an electric field, and V, electric potential. We set up an analogy with ideas from gravitational force and gravitational potential energy to describe two important features of electric fields. Gravitational Force on massive object due to a gravitational field Electric Force on charged object due to an electric field Gravitational Potential We define the gravitational potential V (or, for brevity, just the potential) as the amount of gravitational potential energy stored per unit "gravitational charge" (aka "mass"). Potential is a property of a place within a gravitational field. Each place in a field has its potential. The units of gravitational potential are Joules / kilogram. Electric Potential Electrical potential is a potential energy load factor. It tells us how many joules of EPE are associated with each Coulomb of charge. Potential is a property of a place within an electric field. Each place in a field has its potential. The units of electric potential are Joules / Coulomb, which is also called a "volt." Assignments:
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Physics IIMr. Swackhamer Archives
May 2019
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