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19 Cards in this Set
- Front
- Back
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elementary charge
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1.6x10^-19C
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Coulomb's Law
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Force (electric)= (kq1q2)/(r^2)
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Coulomb's constant
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1. depends on the material between particles
Ko= 9x10^9 N(m^2/C^2) |
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t/f
Fe=negative means particles attract eachother (vice versa) |
t
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Superposition of electric forces
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the net electric force on a charge (q) due to a collection of other charges (Q)is equal to the sum of the of the individual forces that each of the Qs alone exerts on q.
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Electric Fields
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always present, it's the existence of a source charge that can be used to make Fe (conventionally always thought from a positive test charge)
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Electric Field
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E=KQ/(r^2)
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t/f
a negative value means that you have a negative source charge, and the vector points out |
f
the vector points inward |
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conductor
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contains charges that are free to roam around material
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insulator
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material that doesn't have free charges, electrons are tightly bound
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t/f
conductors, but not insulators, become polarized |
f
both conductors and insulators become polarized, but conductors are more pronounced) |
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Electric potention
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the scalar representation of an electric field
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Equation for Electric potential
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Potential=(kQ)/r
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Equipotential
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graphic illustration of electric potential at a certian radius.
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Volt
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the unit of electric potential= J/C=(NxM)/C
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Change in electrical potential energy
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dPE=q(d(elecric potential))
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t/f
a charge experiences no change in potential energy when its final and intial positions are one the same equipotential |
t
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Work done by an electric field
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w= -dPE
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Superpositional of electric potential
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since potential is a scalar, the superposition is additive
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