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Magnetism and Electromagnetism

Magnetism and Electromagnetism
If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

None of the listed here
Increase
Is zero
Decrease

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

3,125 V
31.25 V
1,000 V
2,000 V

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Magnetism and Electromagnetism
Which of the following is the unit of magnetic flux density?

Tesla
Lumens
None of the listed here
Weber

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Magnetism and Electromagnetism
A material which is slightly repelled by a magnetic field is known as

paramagnetic material
diamagnetic material
ferromagnetic material
conducting material

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

an increasing current
decreasing current
current
voltage

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Magnetism and Electromagnetism
For a given wire-wound core, an increase in current through the coil

Reverses the flux lines
Causes no change in flux density
Increases the flux density
Decreases the flux density

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