Lab 8- magnetic force PHY122
.docx
keyboard_arrow_up
School
Stony Brook University *
*We aren’t endorsed by this school
Course
122
Subject
Physics
Date
Apr 3, 2024
Type
docx
Pages
5
Uploaded by EarlMantisMaster964 on coursehero.com
Introduction:
In this lab I will be working with an external magnetic field from the magnet. When a currency carrying wire is brought into the external magnetic field, the wire will feel a force due to this magnetic field. With the right hand rule, the direction of the
magnetic force can be determined and our observations can be tested. This will be done using two different setups which both have multiple configurations.
Objectives:
●
Use the right hand rule to tell the direction of the magnetic force due to the presence of a magnetic field.
●
Match predictions of magnetic force directions to the observations.
Materials needed:
●
3D batteries with battery cage
●
One triple A battery
●
Breadboard
●
Wire leads
●
12 feet wire spool
●
3 neodymium magnets
●
Screw
●
2 0.5 resistors
The neodymium magnets are giving an external magnetic field, in the first set up i
will be creating a DC motor using the magnets, screw, a triple A battery and a stripped wire. Running current through magnets will cause the magnet and screw system to rotate. Note the direction the current is flowing and the direction of the magnetic force, as this will explain why the magnets and screw system are rotating in the direction in which they do.
In the second configuration, there will be a long wire connected to a power source. The wire will be placed close to the neodymium magnets and once it is hooked up to the external power, the current will flow through the wire. This is when you will see
the wire jump either up or down. By noting the direction of the current through the wire and the direction of the magnetic field of the magnet, we can again figure out the direction of the magnetic force which will help explain the reasoning for this jump.
●
The videos in the lab can be watched in order to review problems using the right hand rule.
●
The neodymium magnets are providing the external magnetic field, but we need to realize how to know the direction of the magnetic field, in which the video in the lab report shows.
Setup 1: The Rotating Motor
Once the direction of the magnetic field is figured out, we can make a simple motor using a triple A battery, screw, wire, and the magnets. When everything is properly connected, there will be current running through the magnet. There will be a magnetic force acting on the edge of the magnet due to the moving charge and magnetic field, this then creates a torque which will cause the magnet and screw system to rotate. The direction of rotation will be able to be predicted using the right hand rule to figure out the direction of the force. The youtube video in the lab shows how to build the motor for this lab. With the motor, I will build four different configurations as shown in the diagram below.
The yellow arrows indicate the direction of the magnetic field, which should have been determined in the steps prior to this. I will be flipping both the magnets so that the direction of the magnetic field switches, as well as the battery in order to switch the direction of the current. Be sure to note the direction of the current and the magnetic field in order to find the direction of the magnetic force. This is where it can be explained
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Questions
a)
A proton is moving in a circle under the influence of a uniform magnetic field, B. If an
electric field, E is turned on with the direction of E is perpendicular with the direction
B, explain the path of the proton will take. Sketch a diagram to aid your answer.
b)
Figure 1 (a) and (b) show the direction of charge particle move with velocity v in a
uniform magnetic field B. Find the direction of the force exerts on the charge particle
for (a) and (b) if the charge is,
(a)
(b)
Figure 1
i.
Positive.
ii.
Negative.
arrow_forward
Direction of Force (Right Hand Rule)
The direction of the force on a particle from the magnetic field is not as straight
forward as the force and electric field. You have to use the Right Hand Rule (RHR) to
determine the direction because it is not the same as the direction of the magnetic|
field.
In the image below a charged particle is moving. The direction of motion is shown
with the arrow labeled v (velocity). The magnetic field is also shown with additional
arrows (labeled B).
B (Magnetic Field)
v (velocity –
into the page)
Proton +
What is the direction of the Force on this particle in this Magnetic Field? Make sure
to consider the particle (electron or proton) as that will have an effect on the answer.
Note: For those of you in or who have taken higher levels of calculus, this direction is
also the result of doing a cross product matrix. You can figure out the answer this
way without dislocating your wrist :)
+ x (to the right)
- y (downward)
-x (to the left)
- z (into the…
arrow_forward
Direction: Answer the following problems below.
1. A proton moving at a speed of 75,000 m/s horizontally to the right enters a uniform magnetic field of 0.050 T which is directed vertically downward. Find the direction and magnitude of the magnetic force on the proton.
2. A 0.5 m long wire carries a current of 2.0 A in a direction perpendicular to a 0.3 T magnetic field. What is the magnitude of the magnetic force acting on the wire?
arrow_forward
Question 1. Plot a Graph with the data in Table 2, use Magnetic Force as the vertical axis and Current
as the horizontal axis. Perform a linear least squares fit on the Graph, record the slope, intercept, and
correlation coefficient in the Table 3. [Refer to Appendix 3_ Graphical Analysis of Experiment
Results.docx]. Assume the horizontal copper trace on the Magnetic Force Board perfectly
perpendicular to magnetic field, determine the magnitude of the magnetic field B, show your
calculation in Table 3.
Current (A)
Table 2
0
0.25
0.5
0.75
1
-0.5
-1
Table 3
Mass of Magnet Assembly (gram)
(Measured from scale)
0.000
0.039
0.080
0.122
0.162
-0.094
-0.222
Graph: Measure magnetic force versus Current
Slope:
Intercept:
Correlation coefficient:
Calculate magnetic field strength from the slope of your graph:
Magnetic Force FB
(Newton)
0
0.3822
0.784
1.1956
1.5876
-0.9212
-2.1756
arrow_forward
A long pair of insulated wires serves to conduct 33.0
A of dc current to and from an instrument.
If the wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field
10.0 cm from their midpoint, in their plane (see the figure(Eigure 1))?
Express your answer using two significant figures.
?
Buet =
T
Submit
Request Answer
Part B
Figure
< 1 of 1
Compare to the magnetic field of the Earth (5.0 × 10-5 T).
Express your answer using two significant figures.
?
10.0 cm
Buet/ BEarth =
Submit
Request Answer
2.8 mm
arrow_forward
Estimates: since the force it takes to separate one magnet from your refrigerator is nearly the same as the force it takes to separate two magnets stuck together, that
force F is 5 N and the area of a refrigerator magnet is 8 cm?.
Assume that when these magnets are stuck together or to the refrigerator, they are separated by an effective distance d = 25 um. Use the formula derived above to
estimate the magnetic field strength of the magnet.
Express your answer to one significant figures and include the appropriate units.
arrow_forward
For your senior project, you would like to build a cyclotron that
will accelerate protons to 10% of the speed of light. The largest
vacuum chamber you can find is 42 cm in diameter.
▼
Part A
What magnetic field strength will you need?
Express your answer to two significant figures and include the appropriate units.
B =
Submit
HÅ
Value
Request Answer
Units
?
arrow_forward
Right hand rule for magnetic field due to a long straight
current: Magnetic field lines are a way to graphically represent
I
the magnetic field. The direction of B at any point is tangent to
the field line and the magnitude of B is proportional to the
density of field lines. For the long straight wire, the magnetic
I
field lines form circles around the wire.
There is a right hand rule for the direction in the magnetic field
go around the wire. Grasp the wire with your thumb in the
direction of the current. The direction your fingers wrap around
the wire is the direction that the B field lines go around the
wire. Check that this agrees with your analysis of the long
straight wire from the previous problem.
lines
В
Magnitude of magnetic field due to a long straight current:
The magnitude of the magnetic field at a distance r due to a
very long straight wire carrying current I can be derived from
dB O
the Biot-Savart law:
HoI ds sin ø
HOID ds
dB
4π (s2+ D?) 4π(s2+ D2)3/2
D
where we used…
arrow_forward
A 0.40 uC particle moves with a speed of 20 m/s through a region where the magnetic field has a strength of 0.99 T. You may want to review (Pages 773-777)
Part A
At what angle to the field is the particle moving if the force exerted on it is 4.8 x 10-6 N?
Express your answer using two significant figures.
?
Submit
Request Answer
Part B
At what angle to the field is the particle moving if the force exerted on it is 3.0 x 10-6 N?
Express your answer using two significant figures.
?
Submit
Request Answer
Part
At what angle to the field is the particle moving if the force exerted on it is 1.0 x 10-7N?
Express your answer using two significant figures.
arrow_forward
You have learned that a charge moving in an magnetic field can experience a magnetic force. Remarkably, anytime that a charged particle moves that particle produces its own magnetic field! The image below of magnetic compasses forming a circle around a current-carrying wire demonstrates the shape of the magnetic field. The magnetic field lines forms concentric circles around that wire. The strength of the field decreases with increasing distance away from the wire.
If the current in the wire is 1.15A, what is the magnitude of the magnitude of the magnetic field (in ?μT, or micro-Tesla) a distance of 0.88m away from the wire?
arrow_forward
An electron travels with a speed of 3.0x107 m/s in the
directions shown in the figure (Figure 1) below. A 0.60 T
magnetic field is pointing in the positive x-direction.
Figure
V
Z
B
1 of 1
X
Part A
What is the magnitude of the magnetic force in (Figure 1)?
Express your answer with the appropriate units.
FB =
Submit
Part B
μA
Value
Request Answer
Units
-z direction
45° to +y and +z
?
What is the direction of the magnetic force in the (Figure 1)?
arrow_forward
You have learned that a charge moving in an magnetic field can experience a
magnetic force. Remarkably, anytime that a charged particle moves that particle
produces its own magnetic field! The image below of magnetic compasses forming
a circle around a current-carrying wire demonstrates the shape of the magnetic
field. The magnetic field lines forms concentric circles around that wire. The
strength of the field decreases with increasing distance away from the wire.
If the current in the wire is 1.97A, what is the magnitude of the magnitude of the
magnetic field (in µT, or micro-Tesla) a distance of 0.74m away from the wire?
Note: It is understood that the unit of your answer is in uT, however do not
explicitly include units in your answer. Enter only a number. If you do enter a unit,
your answer will be counted wrong.
arrow_forward
You have learned that a charge moving in an magnetic field can experience a
magnetic force. Remarkably, anytime that a charged particle moves that
particle produces its own magnetic field! The image below of magnetic
compasses forming a circle around a current-carrying wire demonstrates the
shape of the magnetic field. The magnetic field lines forms concentric circles
around that wire. The strength of the field decreases with increasing distance
away from the wire.
If the current in the wire is 4.07A, what is the magnitude of the magnitude of
the magnetic field (in µT, or micro-Tesla) a distance of 0.53m away from the
wir
Note: It is understood that the unit of your answer is in uT, however do not
explicitly include units in your answer. Enter only a number. If you do enter a
unit, your answer will be counted wrong.
arrow_forward
Consider the magnetic forces and particle velocities shown in the figure.
a. What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in (a), assuming B is perpendicular to v?
b. What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in (b), assuming B is perpendicular to v?
c. What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in (c), assuming B is perpendicular to v?
arrow_forward
Which of the following are true, regarding magnetic fields and forces?Select all that are True. The maximum magnetic force on a charged particle occurs when the particle's velocity is parallel to the magnetic field. Earth's north magnetic pole is currently near the planet's south geographic pole. Magnetic forces can perform work on charged particles. If a positively-charged particle is moving in counterclockwise circles in the plane of the screen, the magnetic field must be pointing into the screen. Magnetic field lines exit the south pole of a bar magnet and enter its north pole. If a charged particle is moving in circles in a magnetic field, and the radius of its circular path is decreasing, its speed must be increasing.
arrow_forward
A 6.70 - partice moves through a region of space where an
lectric field of magnitude 1250 N/C points in the positive
direction, and a magnetic field of magnitude 1.22 T points in the
Positive direction
Part A
the net force acting on the particle is 621x10-N in the positive x direction, find the components of the particle's velocity. Assume the particle's velocity is in
the x-y plane
Enter your answers numerically separated by commas.
Vx, Vy, Vz=
?
m/s
Submit
Request Answer
arrow_forward
Consider the magnetic fields and direction of forces shown in the figure.
a. What is the direction of the velocity of a negative charge that experiences the magnetic force shown in (a), assuming it moves perpendicular to B?
b. What is the direction of the velocity of a negative charge that experiences the magnetic force shown in (b), assuming it moves perpendicular to B?
c. What is the direction of the velocity of a negative charge that experiences the magnetic force shown in (c), assuming it moves perpendicular to B?
arrow_forward
Find the direction of the magnetic field at each of the
indicated points.
What is the direction of the magnetic field Bc at Point C?
O Bc is out of the page.
O Bc is into the page.
O Bc is neither out of nor into the page and Bc + 0.
O Bc = 0.
Figure
1 of 2
Part D
What is the direction of the magnetic field Bp at Point D?
A
O Bp is out of the page.
O Bp is into the page.
O Bp is neither out of nor into the page and BD # 0.
O BD
= 0
arrow_forward
Figure 1 shows a particle with a positive charge q and mass m moves through a velocity selector consisting of a magnetic
field and an electric
2.
field. The electric field points downward, as shown in Figure 1.
E
+q
Figure 1
a) In which direction must point for the magnetic force to oppose the electric force?
b) Suppose the electric field is turned off. Now, affected only by the magnetic field, the particle moves in a circular orbit.
Beginning with official
starting equations, find an expression for the radius of the particle's orbit.
arrow_forward
Jumper cables used to start a stalled vehicle often carry a 65-AA current.
How strong is the magnetic field 5.5 cmcm from one cable?
Express your answer to two significant figures and include the appropriate units.
BB =
2.4×10−4 T
Correct
Part B
Compare to the Earth's magnetic field (5.0××10−5−5 TT).
Express your answer using two significant figures.
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Related Questions
- a) A proton is moving in a circle under the influence of a uniform magnetic field, B. If an electric field, E is turned on with the direction of E is perpendicular with the direction B, explain the path of the proton will take. Sketch a diagram to aid your answer. b) Figure 1 (a) and (b) show the direction of charge particle move with velocity v in a uniform magnetic field B. Find the direction of the force exerts on the charge particle for (a) and (b) if the charge is, (a) (b) Figure 1 i. Positive. ii. Negative.arrow_forwardDirection of Force (Right Hand Rule) The direction of the force on a particle from the magnetic field is not as straight forward as the force and electric field. You have to use the Right Hand Rule (RHR) to determine the direction because it is not the same as the direction of the magnetic| field. In the image below a charged particle is moving. The direction of motion is shown with the arrow labeled v (velocity). The magnetic field is also shown with additional arrows (labeled B). B (Magnetic Field) v (velocity – into the page) Proton + What is the direction of the Force on this particle in this Magnetic Field? Make sure to consider the particle (electron or proton) as that will have an effect on the answer. Note: For those of you in or who have taken higher levels of calculus, this direction is also the result of doing a cross product matrix. You can figure out the answer this way without dislocating your wrist :) + x (to the right) - y (downward) -x (to the left) - z (into the…arrow_forwardDirection: Answer the following problems below. 1. A proton moving at a speed of 75,000 m/s horizontally to the right enters a uniform magnetic field of 0.050 T which is directed vertically downward. Find the direction and magnitude of the magnetic force on the proton. 2. A 0.5 m long wire carries a current of 2.0 A in a direction perpendicular to a 0.3 T magnetic field. What is the magnitude of the magnetic force acting on the wire?arrow_forward
- Question 1. Plot a Graph with the data in Table 2, use Magnetic Force as the vertical axis and Current as the horizontal axis. Perform a linear least squares fit on the Graph, record the slope, intercept, and correlation coefficient in the Table 3. [Refer to Appendix 3_ Graphical Analysis of Experiment Results.docx]. Assume the horizontal copper trace on the Magnetic Force Board perfectly perpendicular to magnetic field, determine the magnitude of the magnetic field B, show your calculation in Table 3. Current (A) Table 2 0 0.25 0.5 0.75 1 -0.5 -1 Table 3 Mass of Magnet Assembly (gram) (Measured from scale) 0.000 0.039 0.080 0.122 0.162 -0.094 -0.222 Graph: Measure magnetic force versus Current Slope: Intercept: Correlation coefficient: Calculate magnetic field strength from the slope of your graph: Magnetic Force FB (Newton) 0 0.3822 0.784 1.1956 1.5876 -0.9212 -2.1756arrow_forwardA long pair of insulated wires serves to conduct 33.0 A of dc current to and from an instrument. If the wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field 10.0 cm from their midpoint, in their plane (see the figure(Eigure 1))? Express your answer using two significant figures. ? Buet = T Submit Request Answer Part B Figure < 1 of 1 Compare to the magnetic field of the Earth (5.0 × 10-5 T). Express your answer using two significant figures. ? 10.0 cm Buet/ BEarth = Submit Request Answer 2.8 mmarrow_forwardEstimates: since the force it takes to separate one magnet from your refrigerator is nearly the same as the force it takes to separate two magnets stuck together, that force F is 5 N and the area of a refrigerator magnet is 8 cm?. Assume that when these magnets are stuck together or to the refrigerator, they are separated by an effective distance d = 25 um. Use the formula derived above to estimate the magnetic field strength of the magnet. Express your answer to one significant figures and include the appropriate units.arrow_forward
- For your senior project, you would like to build a cyclotron that will accelerate protons to 10% of the speed of light. The largest vacuum chamber you can find is 42 cm in diameter. ▼ Part A What magnetic field strength will you need? Express your answer to two significant figures and include the appropriate units. B = Submit HÅ Value Request Answer Units ?arrow_forwardRight hand rule for magnetic field due to a long straight current: Magnetic field lines are a way to graphically represent I the magnetic field. The direction of B at any point is tangent to the field line and the magnitude of B is proportional to the density of field lines. For the long straight wire, the magnetic I field lines form circles around the wire. There is a right hand rule for the direction in the magnetic field go around the wire. Grasp the wire with your thumb in the direction of the current. The direction your fingers wrap around the wire is the direction that the B field lines go around the wire. Check that this agrees with your analysis of the long straight wire from the previous problem. lines В Magnitude of magnetic field due to a long straight current: The magnitude of the magnetic field at a distance r due to a very long straight wire carrying current I can be derived from dB O the Biot-Savart law: HoI ds sin ø HOID ds dB 4π (s2+ D?) 4π(s2+ D2)3/2 D where we used…arrow_forwardA 0.40 uC particle moves with a speed of 20 m/s through a region where the magnetic field has a strength of 0.99 T. You may want to review (Pages 773-777) Part A At what angle to the field is the particle moving if the force exerted on it is 4.8 x 10-6 N? Express your answer using two significant figures. ? Submit Request Answer Part B At what angle to the field is the particle moving if the force exerted on it is 3.0 x 10-6 N? Express your answer using two significant figures. ? Submit Request Answer Part At what angle to the field is the particle moving if the force exerted on it is 1.0 x 10-7N? Express your answer using two significant figures.arrow_forward
- You have learned that a charge moving in an magnetic field can experience a magnetic force. Remarkably, anytime that a charged particle moves that particle produces its own magnetic field! The image below of magnetic compasses forming a circle around a current-carrying wire demonstrates the shape of the magnetic field. The magnetic field lines forms concentric circles around that wire. The strength of the field decreases with increasing distance away from the wire. If the current in the wire is 1.15A, what is the magnitude of the magnitude of the magnetic field (in ?μT, or micro-Tesla) a distance of 0.88m away from the wire?arrow_forwardAn electron travels with a speed of 3.0x107 m/s in the directions shown in the figure (Figure 1) below. A 0.60 T magnetic field is pointing in the positive x-direction. Figure V Z B 1 of 1 X Part A What is the magnitude of the magnetic force in (Figure 1)? Express your answer with the appropriate units. FB = Submit Part B μA Value Request Answer Units -z direction 45° to +y and +z ? What is the direction of the magnetic force in the (Figure 1)?arrow_forwardYou have learned that a charge moving in an magnetic field can experience a magnetic force. Remarkably, anytime that a charged particle moves that particle produces its own magnetic field! The image below of magnetic compasses forming a circle around a current-carrying wire demonstrates the shape of the magnetic field. The magnetic field lines forms concentric circles around that wire. The strength of the field decreases with increasing distance away from the wire. If the current in the wire is 1.97A, what is the magnitude of the magnitude of the magnetic field (in µT, or micro-Tesla) a distance of 0.74m away from the wire? Note: It is understood that the unit of your answer is in uT, however do not explicitly include units in your answer. Enter only a number. If you do enter a unit, your answer will be counted wrong.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning