Lecture08

Lecture08 - Lecture 8 Chapter 17. Electric Potential...

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1 Lecture 8 Chapter 17. Electric Potential * Review of Potential Energy * Systems of Charged Objects * Electric Potential Difference in a Uniform Field Electric potential: * is the electric potential energy per unit charge * is a property of an electric field * has a unique value at any point in an electric field * is a property of an electric field and is measured in J/C or V Potential Energy To understand the dynamics of moving objects consider: forces, momenta, work, energy q 1 q 2 q 3 q 4 q 5 q 6 q q 1 For v<<c : K mv 2 2 * A single particle has no electric potential energy. * The kinetic energy of a single particle can be changed work is done on the particle by its surroundings. Energy of a Single Particle Kinetic energy is associated with motion The energy of a single particle with charge q 1 consists solely of its particle energy. E = mc 2 + K q 1 q 2 r 12 Energy of the system: To change the energy of particles we have to perform work. W ext – work done by forces exerted by other objects W int work done by electric forces between q 1 and q 2 Q
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Lecture08 - Lecture 8 Chapter 17. Electric Potential...

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