Question
In: Physics
A permanent magnet is held directly below the center of a coil which is connected to...
A permanent magnet is held directly below the center of a coil which is connected to a voltmeter. As you move the magnet closer towards the coil, the voltmeter reads negative. Which of the following statements is always true?
Moving the magnet farther away from the coil would produce a positive voltage reading instead.
Moving the magnet farther away from the coil would also produce a negative voltage reading.
The closer to the coil the magnet is held in place, the higher the magnitude of the voltage.
Turning the magnet clockwise about an axis perpendicular to the paper (such that "North" would increasingly point right) would produce a negative voltage readout.
Twisting the magnet clockwise about its long axis would produce a positive voltage readout.
Moving the magnet to the right would produce a negative voltage readout.
If you had turned the magnet around so that "South" would be on top, then moving it closer towards the coil would still produce a negative voltage readout.
Solutions
genius_generous answered 1 year agoRelated Solutions
Why does the magnet spin and move in the presence of the coil connected to the function generator?
Why does the magnet spin and move in the presence of the coil connected to the function generator? What role does the frequency of the function generator play? What role does current play in this story? What about the Right Hand Rule? R2: Record at least 2 specific tests that you did to answer the questions above in green.
Why does the magnet spin and move in the presence of the coil connected to the function generator?
Why does the magnet spin and move in the presence of the
coil connected to the function generator? What role does the
frequency of the function generator play? What role does current
play in this story? What about the Right Hand Rule?
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3. Permanent magnet
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The magnet moves as shown. The field of the magnet through the coil is
The magnet moves as shown. The field of the magnet through the coil is
to the left and the primary flux through the coil is decreasing.
to the right and the primary flux through the coil is decreasing.
to the right and the primary flux through the coil is increasing.
to the left and the primary flux through the coil is increasing.
1) How is the real power controlled in a grid-connected wind turbine employing a permanent-magnet synchronous...
1) How is the real power controlled in a grid-connected wind
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with rectifier and inverter? *
rotational speed
inverter output current
generator output voltage
rectifier output voltage
inverter output voltage
2) How do you compare the size of power electronics in a
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same
no power electronics in DFIG
no power electronics in PMSG
smaller in PMSG
smaller in DFIG
3)What is the...
If the magnet moves as shown in the diagram, the primary flux through the coil
1) If the magnet moves as shown in the diagram, the primary flux through the coil
A. increases and points to the right.
B. increases and points to the left.
C. decreases and points to the right.
D. decreases and points to the left.
2) The magnetic flux is changing as it passes through two coils that are exactly the same. The induced voltage is greatest in the coil whose flux is changing fastest.
True
False
3) The...
The magnetic field inside a superconductive magnet is 6T. The length of the coil body is...
The magnetic field inside a superconductive magnet is 6T. The
length of the coil body is l = 30cm and the diameter d = 2cm. The
coil is made of 1km long cable of a superconductive Nb-Ti alloy and
is found surrounded by liquid Helium (T=4.2K) and therefore in the
superconductive phase.
a) Determine the number of windings
b) Determine the current in the coil
c) Determine the electrical Power required
c
1- A magnet created when there is a current through a coil of wire is considered...
1- A magnet created when there is a current through a coil of
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a. electromagnet.
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c. polarized.
d. all of the above
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a. True
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a....
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