Lab 01 Electric Fields IVC 2009

# Lab 01 Electric - Mapping Electric Field and Potential Lines Laboratory Objectives 1 Map the equipotential Lines and the electric field intensity

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Mapping Electric Field and Potential Lines Laboratory Objectives : 1) Map the equipotential Lines and the electric field intensity lines for several different charge distributions. 2) Compute the values of the electric field intensities for these maps. 3) Learn and have fun. pg 1

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Theory : A charge particle placed in an electric field is similar in some respects to an object placed in a gravitational field. Field Particle Force Potential Energy Potential Gravity Mass m mg mgy gy Electric Charge q qE qV V (volts) Where E is the electric field intensity and V is the electric potential. pg 2
In this laboratory you will be: 1) mapping equipotential lines. This is done using a volt meter and marking out constant voltage in numerous places on the paper ; then connecting the dots. 2) This process is repeated for a second constant voltage and so on say: 2 volts, then 4 volts, then 6 volts, then 8 volts. The dashed circles are the equipotential lines. Of course you will only mark out about ten dots or so to determine that you have a circle or some other geometry. Electric field lines are the black perpendicular arrows: pg 3

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Electric field lines (the curve arrow lines) and equipotential curves (dashed circular lines) for an electric dipole Electric field lines are then drawn perpendicular to the equipotential lines you will measuring with a voltmeter. For example two charges have the following equipotential and electric field lines: pg 4
In order to draw equipotential lines and the Force lines (electric field lines) the following should be noted: 1) Near a charged conductor equipotential lines are parallel to the surface. 2) Equipotential lines bend around conductors but bend toward insulators. 3) Equipotential lines do not intersect. pg 5

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1) Electric field lines start from + charges and stop at – charges i.e. such lines do not spontaneously start and end where there is no electrical charge. 2) A conducting object is at the same potential throughout. The conductor’s outline is thus an equipotential line. 3) Lines of force must be drawn perpendicular to such outlines or
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## This note was uploaded on 10/05/2011 for the course PHYS 4B taught by Professor W.christensen during the Summer '09 term at Irvine Valley College.

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Lab 01 Electric - Mapping Electric Field and Potential Lines Laboratory Objectives 1 Map the equipotential Lines and the electric field intensity

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