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Figure (a) shows a nonconducting rod with a
uniformly distributed charge +Q. The rod forms a
10/25 of circle with radius R and produces an electric
field of magnitude Earc at its center of curvature P. If
the arc is collapsed to a point at distance R from P
(see Figure (b)), by what factor is the magnitude of
the electric field at P multiplied?
(a)
+Q
R
Number i
P
!
(b)
Units
P
-R→
This ans

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