A coil with 3300 turns and radius 5 cm is connected to an
oscilloscope (see figure below). You move a bar magnet toward the
coil along the coil's axis, moving from 39 cm away to 27 cm away in
0.2 s. The bar magnet has a magnetic moment of 0.8
A·m2.
(a) What is the approximate magnitude of the signal observed on the
oscilloscope? (Calculate the average emf.)
mV
(b) What approximations or simplifying assumptions did you make?
(Select all that apply.)
| B is constant at the plane of the coil throughout the process. |
| We calculated the instantaneous emf at the halfway point in the bar magnet's motion. |
B is uniform across the plane of the coil. |
Homework Answers
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A coil with 3300 turns and radius 5 cm is connected to an
oscilloscope (see figure...
You throw a bar magnet downward with its south end pointing down (see figure below). The...
You throw a bar magnet downward with its south end pointing down
(see figure below). The bar magnet has a magnetic dipole moment of
1.6 A·m2. Lying on the table is a nearly flat circular
coil of N= 1175 turns of wire, with radius R= 6 cm. The coil is
connected to an oscilloscope, which has a very large
resistance.
At the instant when the magnet is h= 30 cm above the table, the
oscilloscope indicates a voltage of magnitude...
In the figure below a thin coil of radius r1= 4 cm, containing N1= 5300 turns,...
In the figure below a thin coil of radius r1= 4 cm, containing
N1= 5300 turns, is connected through a resistor R = 100 Ω to an AC
power supply running at a frequency f= 2100 so that the current
through the resistor (and coil) is I1sin(2π×2100t). The voltage
across the resistor triggers an oscilloscope that also displays
this voltage, which is 10 V peak-to-peak and therefore has an
amplitude of 5 V (and therefore the amplitude of the current...
1. What is the average Magnetic Flux through one single coil at the initial position of...
1. What is the average Magnetic Flux through one single coil at
the initial position of the bar magnet using
initial = 2.32 x 10-3 T and
= 2.292 x 10-4 m2.
2. What is the total average Magnetic Flux through all 1600
turns in the coil at the initial position of the bar magnet? This
is the value for
initial.
3a. What is the average Magnetic Flux through one single
coil?
b. What is the total average Magnetic Flux...
1. What is the average Magnetic Flux through one single coil at the initial position of...
1. What is the average Magnetic Flux through one single coil at
the initial position of the bar magnet using
initial = 2.32 x 10-3 T and
= 2.292 x 10-4 m2.
2. What is the total average Magnetic Flux through all 1600
turns in the coil at the initial position of the bar magnet?
3. What is the average Magnetic Flux through one single coil and
what is the total average Magnetic Flux through all 1600 turns in
the...
Problem 22.17 (Multistep) A coil of wire is connected to a power supply, and a current...
Problem 22.17 (Multistep)
A coil of wire is connected to a power supply, and a current
runs in the coil. A single loop of wire is located near the coil,
with its axis on the same line as the axis of the coil. The radius
of the loop is 3 cm.
At time t1 the magnetic field at the center of the loop, due to the
coil, is 0.6 T, in the direction shown in the diagram; the current
in...
A thin coil has 60 circular turns of wire of radius 4 cm. The current in...
A thin coil has 60 circular turns of wire of radius 4 cm. The current in the wire is 8 amperes. (a) What is the magnetic dipole moment of this coil? (b) At a distance of 40 cm from the center of the coil, along the axis of the coil, what is the approximate magnitude of the magnetic field contributed by the coil? The coil is placed with its axis along the x axis. A bar magnet whose magnetic dipole...
A round coil has 120 turns and its radius measures 1.60 cm. This coil rotates in...
A round coil has 120 turns and its radius measures 1.60 cm. This coil rotates in a magnetic field of 0.0750 T. a) What is the angular velocity of the coil if the maximum emf produced is 24 mV? b) We can model this coil as a conducting ring rotating within a magnetic field. If it has a resistance of 9 Ω. What will be the magnitude of the Bmax self-generated by the ring at its center?
A circular coil of wire with radius 2 cm and 60 turns is placed in a...
A circular coil of wire with radius 2 cm and 60 turns is placed in a uniform magnetic field of magnitude 0.8 T. The magnetic field is parallel to the area vector; i.e. perpendicular to the plane of the coil. a) What is the magnetic flux through the coil? b) The magnetic field is decreased to 0 T in 0.1 s. What is the magnitude of the emf induced in the coil during this time interval? c) If the coil...
A circular coil of radius 5 cm has 50 turns of wire. The uniform magnetic field...
A circular coil of radius 5 cm has 50 turns of wire. The uniform magnetic field directed into the page/screen (see the figure below) is linearly increased in magnitude form 0 to 0.8 T. What time interval for this increase is needed to induce in the coil emf = 0.25 V? What is the direction of the induced emf (clockwise/counterclockwise)? Which law do we use?
A 55 turn, 4.5 cm diameter coil with R = 0.35 surrounds a 3.7 cm diameter solenoid. The solenoid...
A 55 turn, 4.5 cm diameter coil with R = 0.35 surrounds a 3.7 cm
diameter solenoid. The solenoid is 25 cm long and has 150 turns.
The current through the solenoid as a function of time is I =
I0sin(120t). What is
I0 if the maximum induced current in the coil is 0.20
A?
Show transcribed image text
We were unable to transcribe this imageWe were unable to transcribe this image
1. What is the average Magnetic Flux through one single coil at
the initial position of the bar magnet using
initial = 2.32 x 10-3 T and
= 2.292 x 10-4 m2.
2. What is the total average Magnetic Flux through all 1600
turns in the coil at the initial position of the bar magnet? This
is the value for
initial.
3a. What is the average Magnetic Flux through one single
coil?
b. What is the total average Magnetic Flux...
1. What is the average Magnetic Flux through one single coil at
the initial position of the bar magnet using
initial = 2.32 x 10-3 T and
= 2.292 x 10-4 m2.
2. What is the total average Magnetic Flux through all 1600
turns in the coil at the initial position of the bar magnet?
3. What is the average Magnetic Flux through one single coil and
what is the total average Magnetic Flux through all 1600 turns in
the...
Problem 22.17 (Multistep)
A coil of wire is connected to a power supply, and a current
runs in the coil. A single loop of wire is located near the coil,
with its axis on the same line as the axis of the coil. The radius
of the loop is 3 cm.
At time t1 the magnetic field at the center of the loop, due to the
coil, is 0.6 T, in the direction shown in the diagram; the current
in...
A thin coil has 60 circular turns of wire of radius 4 cm. The current in the wire is 8 amperes. (a) What is the magnetic dipole moment of this coil? (b) At a distance of 40 cm from the center of the coil, along the axis of the coil, what is the approximate magnitude of the magnetic field contributed by the coil? The coil is placed with its axis along the x axis. A bar magnet whose magnetic dipole...
A circular coil of wire with radius 2 cm and 60 turns is placed in a uniform magnetic field of magnitude 0.8 T. The magnetic field is parallel to the area vector; i.e. perpendicular to the plane of the coil. a) What is the magnetic flux through the coil? b) The magnetic field is decreased to 0 T in 0.1 s. What is the magnitude of the emf induced in the coil during this time interval? c) If the coil...
A 55 turn, 4.5 cm diameter coil with R = 0.35 surrounds a 3.7 cm
diameter solenoid. The solenoid is 25 cm long and has 150 turns.
The current through the solenoid as a function of time is I =
I0sin(120t). What is
I0 if the maximum induced current in the coil is 0.20
A?
Show transcribed image text
We were unable to transcribe this imageWe were unable to transcribe this image
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