luu (nml299) – HW07 – markert – (58710)
1
This
printout
should
have
22
questions.
Multiplechoice questions may continue on
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before answering.
001
10.0 points
Two parallel wires carry opposite current as
shown.
i
1
i
2
Find the direction of the magnetic force on
i
2
due to the magnetic field of
i
1
.
1.
to the right
2.
out of the paper
3.
into the paper
4.
to the right and downward
5.
to the left and downward
6.
to the right and upward
7.
to the left
8.
to the left and upward
002
(part 1 of 2) 10.0 points
A proton travels with a speed of 3
.
46
×
10
6
m
/
s
at an angle of 18
.
6
◦
with a magnetic field of
0
.
183 T pointed in the
y
direction.
The charge of proton is 1
.
60218
×
10
−
19
C.
What is the magnitude of the magnetic
force on the proton? Answer in units of N.
003
(part 2 of 2) 10.0 points
The mass of proton is 1
.
67262
×
10
−
27
kg
What is the proton’s acceleration? Answer
in units of m
/
s
2
.
004
10.0 points
A positively charged particle moving paral
lel to the
x
axis enters a magnetic field (point
ing toward the lefthand side of the page), as
shown in the figure below.
x
y
v
z
vector
B
vector
B
+
q
Figure:
ˆ
ı
is in the
x
direction, ˆ
is
in the
y
direction, and
ˆ
k
is in the
z
direction.
What is the initial direction of deflection?
1.
hatwide
F
=
−
ˆ
2.
hatwide
F
= +
ˆ
k
3.
hatwide
F
=
−
ˆ
k
4.
hatwide
F
=
−
ˆ
ı
5.
vector
F
= 0 ; no deflection
6.
hatwide
F
= +ˆ
7.
hatwide
F
= +ˆ
ı
005
10.0 points
A positively charged particle moving at 45
◦
angles to both the
x
axis and
y
axis enters a
magnetic field (pointing out of of the page),
as shown in the figure below.
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luu (nml299) – HW07 – markert – (58710)
2
x
y
v
z
vector
B
vector
B
+
q
Figure:
ˆ
ı
is in the
x
direction, ˆ
is
in the
y
direction, and
ˆ
k
is in the
z
direction.
What is the initial direction of deflection?
1.
hatwide
F
=
1
√
2
(+ˆ
+ˆ
ı
)
2.
vector
F
= 0 ; no deflection
3.
hatwide
F
=
1
√
2
parenleftBig
+
ˆ
k
+ˆ
ı
parenrightBig
4.
hatwide
F
=
1
√
2
(
−
ˆ
−
ˆ
ı
)
5.
hatwide
F
=
1
√
2
parenleftBig
−
ˆ
k
−
ˆ
ı
parenrightBig
6.
hatwide
F
=
1
√
2
(+ˆ
−
ˆ
ı
)
7.
hatwide
F
=
1
√
2
parenleftBig
+
ˆ
k
−
ˆ
ı
parenrightBig
8.
hatwide
F
=
1
√
2
parenleftBig
+ˆ
−
ˆ
k
parenrightBig
9.
hatwide
F
=
1
√
2
parenleftBig
+ˆ
+
ˆ
k
parenrightBig
10.
hatwide
F
=
1
√
2
parenleftBig
−
ˆ
−
ˆ
k
parenrightBig
006
10.0 points
A positively charged particle moving at 45
◦
angles to both the
z
axis and
x
axis enters a
magnetic field (pointing towards the bottom
of the page), as shown in the figure below.
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 Spring '09
 MARKERT
 Electron, Magnetic Field, Electric charge, Magnet

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