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    Properties of inverse squared law fields

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    1. When are electrostatic forces attractive? When are they repulsive? How is this different from gravitational force?

    2. What does it mean to say that electrostatic forces are central forces?

    3. What is the relationship between the magnitude of the force and the inverse square of the separation?

    4. What happens to the magnitude of the force when the separation is held constant, for example, moving one charge in a circle around the other charge?

    5. How is the principle of superposition used to analyze more than two particles?

    6. What is the force between two particles in attraction/repulsion at various separations? Select values for the charges and range of separation, then plot your results in a table, and present them as a line graph.

    7. In the simulation, construct an arrangement of three charges in the shape of an equilateral triangle and find the net force on one of the charges. What happens as you move the charge between the other two charges?

    8. Does the "r" in Coulomb's Law refer to the radius of the particle or the distance between particles?

    9. What does it mean when you calculate a negative force using Coulomb's Law?

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    Solution Summary

    The solution discusses the properties of electric fields and calculate forces in certain configurations.