Unformatted text preview: lectric field
to be zero at
a distance r
center of the
radius r must
be zero. So,
as a function
of radius and
solve for the
zero. 11. A cylindrically symmetric charge distribution has a volume charge density that depends
on the radial position, r, as follows: (r ) 0 (1 2 ) , where is the charge density at
the central axis and "a" is just a size constant. At about what non-zero radius is the
electric field equal to zero?
E) 1.2a 12. What is the electric potential at B relative to a potential of zero an infinite distance away?
When I made "wrong" answer choices for this problem I
accidentally created one that is actually correct. You get full
credit for choosing either of the two correct answers
(here E is correct if you put origin on right side of bar and
make x positive going left. Its a weird looking coordinate
system, but it make...
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