Physics Chapter 20 Study Guide – Flashcards
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You can determine whether an object is positively or negatively charged by bringing an object with ____________ charge near it.
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A known
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Pulling two side-by-side pieces of tape off the surface of a table gives the pieces of tape ___________ charge.
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The Same
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Objects that have the same charge _______ one another.
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Repel
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In a neutral atom, the number of ________ must equal the number of electrons.
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Protons
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The designation of positive and negative for charges was first used by _____ _________.
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Ben Franklin
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Touching a charged object often causes it to ______ its charge.
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lose
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The force produced by charged objects can be _________ than gravitational force.
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greater
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Removing electrons from an atom requires _________________.
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Friction/energy
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A thundercloud becomes charged when positive and negative charges are ___________
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Separated
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Atoms become charged when ___________ are removed or added.
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Electrons
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Plastic
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-
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Wool
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+
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Hard rubber
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-
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Glass
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+
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The force, F ________ ________ with the square of the distance between the centers of the two charged objects.
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Varies Inversely
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The force, F ________ _________ with the charge of the two charged objects.
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Varies directly
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When the charges are measured in coulombs, the distance is measured in meters, and the force is measured in newtons, the constant, K, is ___________ N x m/C²
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9.0 x 10⁹
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Coulomb's law can be used to determine ___ _________ of an electrical force.
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The magnitude
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One coulomb is the amount of charge in __________ electron(s)
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6.24x10¹⁸
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In an arrangement of three or more point charges, the direction of the resultant force on any charge can be determined by _______________________________________________.
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Finding the vector sum of the forces acting on that charge.
