6B_Ch_20_GG - Chapter 20 Electric Potential and Capacitance...

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Chapter 20 Electric Potential and Capacitance
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Electric Potential Energy When a point charge, q o , is placed in an electric field, it experiences a force The work done by the electric field is As this work is done by the field, the potential energy of the charge-field system is changed by ± U
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Electric Potential The potential energy per unit charge, U/q o , is the electric potential – The potential is independent of the value of q o – The potential has a value at every point in an electric field • As a charged particle moves in an electric field, it will experience a change in potential We often take the value of the potential to be zero at some convenient point in the field Sometimes called ground
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