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19 Cards in this Set
- Front
- Back
electric charge
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occurs only in separate parcels, each of +- 1.6x10-19C
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the electrons in an atom
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are some disatnce away from the nucleaus
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an oblect has a positive electric charge whenever
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it has a deficiency of electrons
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the nucleus of an atom
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contains most of the atoms mass
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in the formula F=KQ^Q, the value of the constant k
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depends on the medium the charges are located in
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relative to the electrical force between two protons, the gravitational force btn them is
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weaker
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the electrical field at a point in space is equal in magnitude to
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the force a charge of one coulomb would experience there
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electrical field lines
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have the same pattern around a charged metal sphere as they do around a point charge
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ten million electrons are placed on a solid copper sphere the electrons become
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uniformly distributed on the sphere's surface
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if 10,000 electrons are removed from a neutral plastic ball, its charge is now
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=1.6x10-15 c
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two charges of +q are 1 cm apart.If one of the charges is replaced by a charge of -Q, the magnitude of the force between them is
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the same
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A charge of +q is placed 3 cm from a charge of -Q. A second charge of +q is then placed next to the first. the force on the charge of -Q
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increases to twice its former magnitude
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two charges repel each other with a force of 10-6N when they are 10 cm apart. when the are bought closer togeather until they are 2 cm apart, the force btn them becomes
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2.5x10-5n
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two charges one positive and the other negative are initially 2 cm apartand are then pulled away from each other until they are 6 cm apart. The force btn them is now smaller by a fcator of
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9
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the force between two charges of -3.0x10-9 C that are 50mm apart is
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3.2x10-5N
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two equal charges attract each other with a force of 1.0x10-5N. when they are moved 4mm farther apart. the force between them becomes 2.5x10-6N. The original separation of the charges was
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4mm
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the magnitude ofthe charges in lultiple choice 18 is
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1.3x10-10C
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the magnitude of the force of an electron to an electric field of 200 N/c is
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3.2x10-17N
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the electric field 20mm from a certain charge has a magnitude of 1.0x10^5 N/C. the magnitude of E 10mm from the charge is
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4.0x10^5N/c
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