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Physics12 Lab Report 3

Physics12 Lab Report 3 - point charges and the line charges...

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Physics Lab Report 3 The Electric Field and Electric Potential Teddy Portney 3/5/07 Lab LK Section A I. Introduction Electricity is a very useful thing in today’s world. Just about everything we do involves electricity in some way. Electricity, in the form we know it, is actually electric potential, measured in Volts. To calculate the electric field from a known voltage, use the equation E(x,y,z) = - V(x,y,z) . It can also be said that E = ΔV/Δs . The electric field is more important in the sense of physics because it is necessary to analyze point charges and draw field lines. II. Procedure There were two parts to this lab; each of which with a similar procedure but one different component. We were given a power supply, a multimeter, and two panels with conducting paper. On one panel, the diodes from the power supply were connected to the conducting paper as point charges, whereas on the other they were attached to long strips of metal, therefore spreading the charge over a much greater area. For each case (the
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Unformatted text preview: point charges and the line charges) we recorded the electric potential at every value of x between x = –6 (the location of one charge) and x = 6 (the location of the other charge). After that, we measured the equipotential lines, by finding other locations where the electric potential was the same as on the x-axis for any given integer x- value. III. Data The tables of the volts vs. x- values are displayed here, along with the graphs. Diagrams showing equipotential lines and field lines are attached to this report. IV. Analysis This data shows that the electric field is significantly different for point charges than it is for line charges. V. Conclusion Potential at y=0, point charge y = 0.6396x + 5.1377 R 2 = 0.935 2 4 6 8 10 12-8-6-4-2 2 4 6 8 Potential at y=0, line charge y = 0.8238x + 5.02 R 2 = 0.9991 2 4 6 8 10 12-8-6-4-2 2 4 6 8...
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