chp32Electrostatics

chp32Electrostatics - Electrostatics • We have seen a...

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Unformatted text preview: Electrostatics • We have seen a property of objects called mass . Mass is responsible for the Gravitational Force . (S.I. unit is the kilogram (kg).) • Another property of objects is charge . Charge is responsible for Electric Force . (S.I. unit is the coulomb (C)). • Electrostatics is the study of: 1. force fields set up by charged objects that don’t move. 2. forces between charged objects that don’t move. 1 Charged Objects • Atoms 1. Most are neutral: Number of electrons equal number of protons. 2. Positive ions : atoms that have lost electrons . 3. Negative ions : atoms that have gained electrons . • Objects 1. Most are neutral, composed of neutral atoms. 2. Some have a negative charge because they somehow gained electrons . 3. Some have a positive charge because they somehow lost electrons . • Like Charges Repel; Opposites Attract . 2 Charge Transfer How Do Objects Lose or Gain Electrons? 1. Friction • Electrons transferred by contact • Rubbing plastic with fur: fur loses electrons....
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This note was uploaded on 10/19/2011 for the course PHY 2020 taught by Professor Staff during the Spring '08 term at University of Florida.

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chp32Electrostatics - Electrostatics • We have seen a...

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