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Electric potential energy (PE) |
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the work done in moving a positive charge against
an electric field |
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Potential (V) |
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the work per unit of charge done against electric
forces to move a positive charge from infinity to a specific point within
an electric field |
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Potential difference (VA - VB
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the work per unit of charge done by electric
forces to move a positive charge from higher to lower potential |
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the work done in moving a positive charge against
an electric field |
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PEgain = Work against the electric
field |
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PE“loss” = Work done by the electric
field |
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Work is done when a force is applied and moves
something |
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The scalar product of the force multiplied by
the distance parallel to the direction of force equals the work done. |
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the work
per unit of charge done against electric
forces to move a positive charge from infinity to a specific point
within an electric field |
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Potential
is NOT a vector quantity. |
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Potential due to a positive charge is + |
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Potential due to a negative charge is - |
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Electric work |
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the potential energy gain moving a charge across
a potential difference |
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Moving a positive charge from low potential to
high potential increases PE, work is done against the field. |
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Moving a positive charge from high potential to
low potential decreases PE, work is done by the field. |
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Work against the field causes an increase in PE |
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Work by the field causes a decrease in PE
(increase in KE) |
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potential energy (PE) = joules ( J ) |
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work (W) = joules ( J ) |
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potential (V) = volts (V) |
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electron-volts (eV) - a unit of energy
equal to the amount of energy gained by an electron moved through a
potential difference of 1 volt |
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Notes