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Electric Fields Experiment – The Cenco Overbeck Apparatus Cameron James Prillhart / Christina Bouchillon Physics 222- Section 1 Aaron Kirby 1/18/17 & 1/25/17 Introduction: The scientific purpose of this lab was to study the concept of an electric field and how to define one, learn how to measure the electric field strength, study the relationships between electric field strength and electric potential, and to study electrode configurations and how fields patterns change for different configurations. Electric fields are spaces in which forces will be exerted on test charges placed within the space. The magnitude of the electric field’s strength  E is given by the ratio of force F divided by the magnitude of the charge, q, and can be written as E = F/q Electric fields are vector quantities and their direction should be taken as the direction in which a test charge would move. Electric fields are produced by charge distributions, which are simply other charges created by the separation of charges of some EMF (electromotive force) from a power supply. In our case, the EMF is applied to two electrodes and in between them will lay an electric field and equipotential lines and the charges will be distributed differently at different points. Measuring the electric potential can be done with voltmeters, which makes it possible to relate this value to electric field strength to calculate the electric field using properties of Coulomb’s law. The electric potential is best known in terms of potential difference