Plab12 - Lab 12: Contours of Equal Electric Potential and...

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Unformatted text preview: Lab 12: Contours of Equal Electric Potential and the Electric Field SAR Physics A M Kolchin I. Introduction We have discussed electric potential energy in class. Suppose we have a large fixed positive charge (+ Q ). If we wish to move a small positive charge (+ q t ) towards + Q , we must push it uphill, increasing its potential energy. The potential energy of this small charge depends on its position in the electric field of + Q and on its own charge + q t . The concept of electric potential , was defined in class as potential energy per unit charge: V = P.E./q t measured in joules/coulomb, or volts. We saw that electrical potential depends only on position in the electric field, not on the charge feeling the force. In this lab, we will map lines of equal potential (called equipotential lines) for a charge distribution . These lines are analagous to contour lines on a topograph- ical map (topo map) along which elevation is constant. In addition to using equipotential lines to visualize the po- tential, we have also used electric field lines (lines of force) to visualize the strength and direction of the electric field....
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This note was uploaded on 10/19/2011 for the course PHY 2020 taught by Professor Staff during the Spring '08 term at University of Florida.

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Plab12 - Lab 12: Contours of Equal Electric Potential and...

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