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Unformatted text preview: of the
test charge. Electric Potential To solve this problem, we introduce a new variable,
the electric potential, V.
We deﬁne electric potential as:
q2 Electric Potential Again the far more useful quantity will be the
change in electric potential or what is referred to
as the electric potential difference.
∆VA→B = VB − VA = ∆Ue
q2 Electric potential is measured in Volts. Where:
1!Volt = 1 Joule/Coul.!=!1!(Nm)/Coul This equation is always valid. DO NOT CONFUSE electric potential energy, PEelec,
and electric potential, V. This means that for a point charge we say:
= ke q1
rA Many times electric potential will be referred to
as voltage just to distinguish it further from
electric potential energy. Note that the electric potential difference is
independent of the test charge, q2. Electric Potential Field Model The electric po...
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