Study Guide (1)

Thepotentialisnotavectoritonlyhasmagnitude

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Unformatted text preview: of
error
where
 appropriate.
 
 Lab
12
–
Electric
Fields
 
 If
you
have
a
point
charge
of
a
particular
sign,
you
should
know
what
its
 equipotential
and
electric
field
lines
look
like.
 You
should
be
able
to
describe
them
with
words.
 You
should
know
how
the
strengths
of
the
lines
relate
to
the
charge.
 
 Remember
the
two
equations:
 
 1q ˆ E= r 4 πε0 r 2 
 1q V= 4 πε0 r 
 How
do
these
equations
allow
you
to
describe
the
lines?
 Note
that
the
electric
field
is
a
vector,
so
it
has
direction.
 The
potential
is
not
a
vector;
it
only
has
magnitude.
 Remember
that
the
electric
field
lines
cross
the
equipotential
lines
at
90
degrees.

So
 if
you
are
given
some
equipotential
lines,
be
able
to
draw
electric
field
lines,
or
 describe
the
electric
field
lines.
 You
shou...
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