Magnetic Fields Magnitudes and Angular Speed Physics Problems There are 18 questions in total that needs to be completed in the file attached to this quest

Magnetic Fields Magnitudes and Angular Speed Physics Problems There are 18 questions in total that needs to be completed in the file attached to this question. An example problem is as follows:A proton moves in a circular path perpendicular to a constant magnetic field so that it
takes 4.28×10−6
s to complete the revolution.
Determine the strength of the constant
magnetic field. The angular speed is given
in radians per unit time.Please show all work that goes into solving each problem. joseph (dj23889) – Homework #7 – yu – (44020)
This print-out should have 18 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001 10.0 points
A proton moves in a circular path perpendicular to a constant magnetic field so that it
takes 4.28×10−6 s to complete the revolution.
Determine the strength of the constant
magnetic field. The angular speed is given
in radians per unit time.
Answer in units of T.
002 10.0 points
A crossed-field velocity selector has a magnetic field of magnitude 0.077 T.
The mass of the electron is 9.10939 ×
10−31 kg.
What electric field strength is required if
64 keV electrons are to pass through undeflected?
Answer in units of V/m.
003 (part 1 of 2) 10.0 points
A proton with speed of 1 × 107 m/s enters a
region of uniform magnetic field of magnitude
0.8 T, directed into the page, as shown in the
figure. The proton enters the magnetic field
at an angle of 42◦ with respect to the normal
of the field’s boundary and exits the magnetic
field at an angle φ with respect to the normal
of the field’s boundary at a distance d from
the place where the charged particle entered
the magnetic field.
The charge on electron is 1.60218×10−19 C.
φ
1
B
v′
B
d
42◦
v
7
10
m
/s
B
B
×
1
Figure: Not drawn to scale.
Find the angle φ .
Answer in units of ◦ .
004 (part 2 of 2) 10.0 points
The charge on a proton is 1.60218 × 10−19 C
and its mass is 1.67262 × 10−27 kg .
Find the distance d .
Answer in units of m.
005 10.0 points
An electron is accelerated by a 6.7 kV potential difference.
The charge on an electron is 1.60218 ×
10−19 C and its mass is 9.10939 × 10−31 kg.
How strong a magnetic field must be experienced by the electron if its path is a circle of
radius 5.9 cm?
Answer in units of T.
006 10.0 points
A segment of wire carries a current of 66 A
along the x axis from x = −6 m to x = 0 and
then along the z axis from z = 0 to z = 4.1 m.
In this region of space, the magnetic field is
equal to 72 mT in the positive z direction.
What is the magnitude of the force on this
segment of wire?
Answer in units of N.
007 10.0 points
A solenoid of radius 7.23 cm is made of a
long piece of wire of radius 1.797 mm, length
68.2 m and resistivity 9.34 × 10−9 Ω · m. The
solenoid is closely wound with a single wire
thickness.
Find the magnetic field at the center of the
joseph (dj23889) – Homework #7 – yu – (44020)
solenoid if the wire is connected to a battery
with an emf of 10.32 V. The permeability of
free space is 1.25664 × 10−6 T · m/A.
Answer in units of T.
008 (part 1 of 2) 10.0 points
A constant magnetic field of magnitude
points out of the paper. There is a steady
flow of a horizontal current flowing from left
to right in the x direction. In the figure, the
point at the upper edge P1 and at the lower
edge P2 have the same x coordinate.
y
B = 1.2 T
voltmeter is downward for either positive or
negative charge carriers.
2. The direction of the current through the
voltmeter is downward for positive charge carriers and upward for negative charge carriers.
3. The direction of the current through the
voltmeter is upward for either positive or negative charge carriers.
4. The direction of the current through the
voltmeter is upward for positive charge carriers and downward for negative charge carriers.
9
cm
x
2
P1
7.4 A
2.5 cm
~
B
V
P2
2.2 m
What is the magnitude of the electric field
between the upper and lower surfaces? The
elemental charge is 1.6021 × 10−19 C. Assume
that the mobile charge carriers are either electrons or holes. The holes have the same magnitude of charge as the electrons. The number
of mobile charge carriers for this particular
material is n = 8.49 × 1028 electrons/m3 .
Answer in units of N/C.
009 (part 2 of 2) 10.0 points
For this part of the problem a voltmeter (with
an internal resistance less than infinity) is
connected to the system, where the contact
points are on the upper and lower surfaces
and are in the same vertical plane.
Choose the correct answer for the case
where the sign of the charge of current carriers are either negative (electrons) or positive
(holes).
1. The direction of the current through the
5. The current through the voltmeter is zero
for either positive or negative charge carriers.
010 (part 1 of 2) 10.0 points
A cyclotron designed to accelerate protons
has a magnetic field of magnitude 0.16 T over
a region of radius 4.7 m.
The charge on a proton is 1.60218×10−19 C
and its mass is 1.67262 × 10−27 kg.
What is the cyclotron frequency?
Answer in units of rad/s.
011 (part 2 of 2) 10.0 points
What is the maximum speed acquired by the
protons?
Answer in units of m/s.
012 10.0 points
A wire 535 m long is in a 0.336 T magnetic
field. A 2.86 N force acts on the wire.
What current is in the wire?
Answer in units of mA.
013 (part 1 of 2) 10.0 points
A circular coil of 317 turns and area 0.71 m2
is in a uniform magnetic field of 0.18 T. The
maximum torque exerted on the coil by the
field is 0.0061 N · m.
Calculate the current in the coil.
Answer in units of A.
joseph (dj23889) – Homework #7 – yu – (44020)
014 (part 2 of 2) 10.0 points
Assume the 317 turns of wire are used to form
a single-turn coil with the same shape but
much larger area.
What is the current if the maximum torque
exerted on the coil by the field is 0.0061 N · m?
Answer in units of A.
015 10.0 points
The electrons in a beam are moving at 2.5 ×
108 m/s in an electric field of 16000 N/C.
What value must the magnetic field have if
the electrons pass through the crossed fields
undeflected?
Answer in units of µT.
016 (part 1 of 2) 10.0 points
An electron circles at a speed of 7690 m/s in a
radius of 2.87 cm in a solenoid. The magnetic
field of the solenoid is perpendicular to the
plane of the electron’s path.
The charge on an electron is 1.60218 ×
10−19 C and its mass is 9.10939 × 10−31 kg.
Find the strength of the magnetic field inside the solenoid.
Answer in units of T.
017 (part 2 of 2) 10.0 points
Find the current in the solenoid if it has
17.1 turns/cm.
Answer in units of mA.
018 10.0 points
A 1.25 m long wire loop carrying a current
of 1.65 A is in the shape of an equilateral
triangle.
If the loop is placed in a constant magnetic
field of magnitude 0.608 T, determine the
maximum torque that acts on it.
Answer in units of N · m.
3

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