Lab 7
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Lab 7
Magnetic Induction
Part I Magnetic flux
•
•
Recall and write down the definition of magnetic flux, the angle is between
magnetic field direction and 0 and 90 degrees.
•
Write down the magnetic flux in each case use the symbol given in the
diagram.
If zero, please just write 0.
a: 0
b: 90
c: 60
•
Open
Friday’s law simulator
•
Keep all as it is when you just opened the simulator, do not move anything.
•
Is there any flux in the coil?
No
•
Is there any change in flux in the coil?
No
•
Now select Show Field Lines, check if your answer is correct.
•
Now imagine that you are moving the magnet toward the coil.
•
Is there flux in the coil?
Yes
•
Is there any change in flux in the coil?
Yes
•
Please state Lenz’s law here:
The induced electric current that flows in a direction such that the current
opposes the change that induced it.
•
Use the bottom wire, will there be any current according to Faraday’s law,
if so, what will be the direction the current (left or right) on the bottom wire.
Left
•
Now move the magnet into the coil, check the direction of the current, if
the current flow to the left, the needle should show negative direction and vice versa.
Left, negative
•
Now leave the magnet inside the coil, is there any current?
Why not?
No, the current balances out and there is no direction or movement
•
Now pull magnet out (move towards right) of the coil, what happens to the
current direction.
The current turns right, positive
•
Now move the magnet in and out with faster or slower speed, observe and
describe the difference in the current.
The faster the magnet is pulled in/out, the higher the current jump while the slower
the magnet is pulled in/out, the slower the current jump will be.
•
In this simulation, where did the electric energy come from or who is
doing the work?
The electric energy came from the magnet
Part II Motional EMF
Open the Motional EMF simulator
•
Click play and observe.
Suppose this purple force is a constant force
applied by you on the conducting rod (red).
The rod is on a frictionless conducting rail
(Blue), the rail is connected to a resistor (green).
Describe the motion of the rod with
your constant force applied, describe what happens if you remove your (purple) force.
When there is a constant force applied to the rod, it begins to accelerate. This causes a
resistive force to pull on the rod which makes the rod reach a constant velocity. After
the constant force is removed, the rod begins to slow down (negative acceleration) and
eventually stops. If the purple force is removed, the rod stops.
•
Reset and run the simulation again, as you begin to move the rod to the
right, will there be any current in the resistor?
If so, in what direction (clock or counter-
clock)
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Related Questions
Part A
Find the direction of the magnetic field at each of the indicated points.
What is the direction of the magnetic field BA at Point A?
• View Available Hint(s)
O BA is out of the page.
O BA is into the page.
O BA is neither out of nor into the page and BA +0.
BA = 0.
Submit
Figure
1 of 1
Part B
What is the direction of the magnetic field BB at Point B?
O BR İS out of the page.
A
O BR is into the page.
B
BB is neither out of nor into the page and BB +0.
BB = 0.
Submit
Request Answer
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2. A hypothetical charge q with a mass m moves in a circular path perpendicular to a uniform magnetic field with a magnitude of B and is direct into the page. If the speed of the hypothetical charge is v:
A. Determine the radius of the circular path.
B. Determine the time interval required to complete one revolution.
Pointing System for Number 2:
• What are the given in the problem?
• What are the unknown variables?
• What are the equations that you are going to use?
• Solution and answer for Part A.
• Solution and answer for Part B.
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Part A
What is the magnitude of the torque on the current loop in (Figure 1)?
Figure
1 of 1
Express your answer in newton-meters.
• View Available Hint(s)
ΑΣφ
?
2.0 cm
T =
N. m
2.0 mm
Wire
2.0 A
Submit
0.20 A
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V and a second that measures its radius of curvature
in a perpendicular magnetic field as shown in (Figure
1).
The ion begins at potential V and is accelerated toward
zero potential. When the particle exits the region with
the electric field it will have obtained a speed u.
Part A
With what speed u does the ion exit the acceleration region?
Figure
+ + + + + + +
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part B
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• B?
* In the figure above, a wire is oriented horizontally across the screen with a current that is moving right. The direction of the magnetic field B at point above the wire is
B?•
* In the figure above, a wire is oriented perpendicular to the screen with a current that is moving out . The direction of the magnetic field B at point above the wire is
Submit Answer Tries 0/2
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How do I solve the attached physics question about magnetic forces and fields?
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QUESTION 11
A point, B, is 1.8 meter away from a wire that carries a 93 A current in the indicated direction. The magnitude of the magnetic field at point B is
T. Exponential format with 2 SF.
• B
QUESTION 12
What is the direction of the magnetic field at point B?
A. to the left
B. to the right
C. out of the page
D.into the page
arrow_forward
Magnetic Fields and Magnetic Field Lines• Define magnetic field and describe the magnetic field lines of various magnetic fields.
arrow_forward
1-
B? •
In the figure above, a wire is oriented horizontally across the screen with a
current that is moving left . The direction of the magnetic field B at point below the
wire is
Submit Answer
Tries 0/2
B? OI
In the figure above, a wire is oriented perpendicular to the screen with a
current that is moving out. The direction of the magnetic field B at point to the left
of the wire is
Submit Answer
Tries 0/2
•B?
In the figure above, a wire is oriented perpendicular to the screen with a
current that is moving out. The direction of the magnetic field B at point to the right
of the wire is
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both parts plz
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Ferromagnets and Electromagnets• Define ferromagnet.• Describe the role of magnetic domains in magnetization.• Explain the significance of the Curie temperature.• Describe the relationship between electricity and magnetism.
arrow_forward
What are the magnetic field strength and direction at points 1,2, and 3 in the
Figure. Show the details of your work.
1•
|2.0 cm
10 A
2.
4.0 cm
10 A
[2.0 cm
3.
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Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field• Describe the effects of magnetic fields on moving charges.• Use the right hand rule 1 to determine the velocity of a charge, the direction of the magnetic field, and the direction ofthe magnetic force on a moving charge.• Calculate the magnetic force on a moving charge.
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After this activity you should know: • Biot-Savart law • the direction and magnitude of the magnetic field created by a
long straight thin current • be able to calculate magnetic field due to multiple currents.
Magnetic fields are generated by moving charges or currents. Even a
permanent magnet can be thought of as a large collection of current loops
on an atomic scale.
ds
Biot-Savart Law: The Biot-Savart law gives the magnetic field dB at point P
due to a small segment ds of a wire carrying a current I:
HoI ds x î
dB
r2
P
Here r is the vector from the small segment ds to the point P. The direction
of ds is the same direction as the current at position on the wire
I
1. A long straight thin wire carries current as shown. Use the Biot-Savart
law and the right hand rule to determine the direction of the magnetic
field at the points shown.
ds
What is the direction of the magnetic field at point 1
(left/right/in/out/top/bottom/zero)? Hint: pick a small length ds of
the current and draw the…
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Magnets• Describe the difference between the north and south poles of a magnet.• Describe how magnetic poles interact with each other.
arrow_forward
Eddy Currents and Magnetic Damping• Explain the magnitude and direction of an induced eddy current, and the effect this will have on the object it isinduced in.• Describe several applications of magnetic damping.
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Q6
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9
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How do I solve the attached physics question about magnetic forces and fields?
arrow_forward
Lecture all example show work
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Please provide a step by step solution so I can understand this practice problem
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Electromotive Force: Terminal Voltage• Compare and contrast the voltage and the electromagnetic force of an electric power source.• Describe what happens to the terminal voltage, current, and power delivered to a load as internal resistance of thevoltage source increases (due to aging of batteries, for example).• Explain why it is beneficial to use more than one voltage source connected in parallel.
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Please fast solve the issue.
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Part A
What is the total magnitude of the magnetic flux ( Pinitial) through the coils before they are rotated (in the original position where
the plane of the loops are perpendicular to Earth's magnetic field)?
Express your answer numerically in Webers.
• View Available Hint(s)
8
Pinitial| =
9.25 • 10
Wb
Submit
Previous Answers
X Incorrect; Try Again; 4 attempts remaining
You have calculated the flux through one turn of the coil, but the coil has 160 turns.
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The Hall Effect• Describe the Hall effect.• Calculate the Hall emf across a current-carrying conductor.
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I need the answer as soon as possible
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Plz correct solution.
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Magnetic Force between Two Parallel Conductors• Describe the effects of the magnetic force between two conductors.• Calculate the force between two parallel conductors.
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Instruction:
• Solve the following by applying Faraday's Law
• Explain briefly the ways on how you solve the given problem
• Give application of Faraday's Law in real life
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Hi can you explain and show how to get the direction of the magnetic field, and why it is realistic? Show all work thank you
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An electron moves at 2.40 x 10 m/s through a region in which there is a magnetic field of
unspecified direction and magnitude 7.10 x 10-2 T.
Part A
What is the largest possible magnitude of the acceleration of the electron due to the magnetic field?
Express your answer with the appropriate units.
undo rego Tese keyboard shortcuts Help
m
a = 3.33 • 1016
Submit
Prevlous Anewers Request Answer
X Incorrect; Try Again; 5 attempts remaining
Part B
What is the smallest possible magnitude of the acceleration of the electron due to the magnetic field?
Express your answer with the appropriate units.
a = 0
Prevlous Anewere
v Correct
Part C
If the actual acoeleration of the electron is one-fourth of the largest magnitude in part A, what is the angle between th
Express your answer in degrees to three significant figures.
0= 14.59
Previoua Anaware
O Type here to search
99+
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