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19 Cards in this Set

  • Front
  • Back
electric charge
occurs only in separate parcels, each of +- 1.6x10-19C
the electrons in an atom
are some disatnce away from the nucleaus
an oblect has a positive electric charge whenever
it has a deficiency of electrons
the nucleus of an atom
contains most of the atoms mass
in the formula F=KQ^Q, the value of the constant k
depends on the medium the charges are located in
relative to the electrical force between two protons, the gravitational force btn them is
weaker
the electrical field at a point in space is equal in magnitude to
the force a charge of one coulomb would experience there
electrical field lines
have the same pattern around a charged metal sphere as they do around a point charge
ten million electrons are placed on a solid copper sphere the electrons become
uniformly distributed on the sphere's surface
if 10,000 electrons are removed from a neutral plastic ball, its charge is now
=1.6x10-15 c
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
the same
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
increases to twice its former magnitude
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
2.5x10-5n
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
9
the force between two charges of -3.0x10-9 C that are 50mm apart is
3.2x10-5N
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
4mm
the magnitude ofthe charges in lultiple choice 18 is
1.3x10-10C
the magnitude of the force of an electron to an electric field of 200 N/c is
3.2x10-17N
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
4.0x10^5N/c