Worksheet:
Chapters 17
A solid metal sphere of radius
R
1
= 50 cm has a charge of +2.0
μ
C.
1)
What is the strength of the electric field at the center of the sphere?
E = 0
2)
What is the maximum strength of the electric field caused by the sphere?
Where is it found?
E =7.19 x 10
4
N/C at r = R
1
= 50 cm
3)
What force would act on an excess electron (
q
= 1.60 x 10
19
C) on the surface of the sphere?
1.15 x
10
14
N [toward center of sphere]
4)
What is the strength of the electric field at a point 60 cm from the center of the sphere?
4.99 x 10
4
N/C
5)
What force would act on an alpha particle (
q
= +3.20 x 10
19
C) located 60 cm from the center of
the sphere?
1.60 x
10
14
N [away from center of sphere]
A point charge +
q
is located at
x
= 1.0 m.
A second point charge –3
q
is located at
x
= 1.0 m.
6)
Determine the electric field strength for
x
< 1 in terms of
q
,
x
, and fundamental constants.
(
29
(
29
2
2
3
1
1
kq
kq
E
x
x
=

 

7)
Determine the electric field strength for –1 <
x
< 1 in terms of
q
,
x
, and fundamental constants.
(
29
(
29
2
2
3
1
1
kq
kq
E
x
x
= 

+

8)
Determine the electric field strength for
x
> 1 in terms of
q
,
x
, and fundamental constants.
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 Spring '09
 Ramesh
 Physics, Charge, Work, Electric charge, 1.0 M, 0.55 M, 0.268 m, 0.397 m, 0.553 m

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