linares (jl36797) – homework 02 – Turner – (56705)
1
This printout should have 13 questions.
Multiplechoice questions may continue on
the next column or page – fnd all choices
beFore answering.
001
10.0 points
±our point charges,
each oF magnitude
9
.
87
μ
C, are placed at the corners oF a square
27
.
7 cm on a side.
IF three oF the charges are positive
and one is negative, fnd the magnitude
oF the Force experienced by the negative
charge. The value oF Coulomb’s constant is
8
.
98755
×
10
9
N
·
m
2
/
C
2
.
Answer in units oF N.
002
10.0 points
A charge
Q
is spread uniFormly along the
circumFerence oF a circle oF radius
R
. A point
charge
q
is placed at the center oF this circle.
What is the total Force exerted on
q
as
calculated by Coulomb’s law?
1.
Use 2
π R
For the distance.
2.
None oF these
3.
Use
R
For the distance.
4.
Use 2
R
For the distance.
5.
The result oF the calculation is zero.
003
10.0 points
A charge
q
1
oF

5
.
00
×
10

9
C and a charge
q
2
oF

1
.
60
×
10

9
C are separated by a distance
oF 35
.
0 cm.
±ind the equilibrium position For a third
charge oF +15
.
0
×
10

9
C by identiFying its
distance From
q
1
.
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 Fall '08
 ERSKINE/TSOI
 Charge, Work, Electric charge, ball, metal balls, linares

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