Lab 2 Handout Mapping E-field-1


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Unformatted text preview: s182 S2013 Lab2 The second circuit is a probe circuit, which is designed to allow you to compare the potential between a point on the mapping board, and some other reference point. The probe arm is attached to a galvanometer and key switch, which can be used to sense the potential at specific points between the conductors. (The galvanometer is a sensitive device for detecting an electrical current.) The probe circuit can be used on the surface of the conducting sheet in two ways: Identify points that are at the same electric potential i.e. map an equipotential surface. Directly measure the potential difference between a point on the sheet and a reference. The mapping board has a set of convenient “tap” points that correspond to specific potential differences with respect to a reference. These taps can be used to choose the specific numerical values of the potential for which you might want to map out the equipotential surface. For example, if one side of the galvanometer is connected to a tap at 2.5 V, and the probe is moved to a location on the field m...
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This note was uploaded on 05/06/2013 for the course PHYSICS 184 taught by Professor Menon during the Spring '13 term at UMass (Amherst).

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