This preview shows page 1. Sign up to view the full content.
23. (a) We use the usual notation for the linear charge density:
λ
=
q/L
.
The arc length is
L = r
θ
if
is expressed in radians
.
Thus,
L
= (0.0400 m)(0.698 rad) = 0.0279 m.
With
q
=
−
300(1.602
×
10
−
19
C), we obtain
λ
=
−
1.72
×
10
−
15
C/m.
(b) We consider the same charge distributed over an area
A
=
π
r
2
=
π
(0.0200 m)
2
and
obtain
σ
=
q/A
=
−
3.82
×
10
−
14
C/m².
(c) Now the area is four times larger than in the previous part (
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 01/25/2011 for the course PHYSICS 17029 taught by Professor Rebello,nobels during the Fall '10 term at Kansas State University.
 Fall '10
 Rebello,NobelS
 Charge

Click to edit the document details