Lab 2 Handout Mapping E-field-1

The electric potential or just potential is the

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Unformatted text preview: electric force F exerted on a charge q0, being given by F= q0E. Clearly, E and F have the same direction. The electric potential (or just potential) is the potential energy per unit charge. (Because the electric potential is measured in units of Volts, using a voltmeter, it is sometimes called the voltage.) Electric current is the motion of charge, and charges move from high potential energy to low potential energy. An equipotential surface joins all points having the same electric potential energy per unit charge. There is no motion of charges, therefore, along an equipotential. This equipotential surface is everywhere perpendicular to the electric field lines that intersect it. (Electric field lines never intersect one another. Why is that?) This allows one to use the equipotential surfaces to sketch the electric field lines. In this experiment we will map out the electric field for two different configurations of charged objects. Electric fields live in 3‐dimensional space, but we will limit ourselves to electric field lines on a two‐dimensional surface. We will study the electric field between two charged objects, such as a sma...
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