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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

KT3 and 1CT6
10"2 and KT5
1CT3 and 1CT7
KT4 and KT8

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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
Decreases the flux density
Increases the flux density

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Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

None of the listed here
Dielectric
Diamagnetic
Ferromagnetic

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Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

2.4 At
24 At
2,400 At
240 At

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Paramagnetic material
Ferro magnetic material
Bipolar
Diamagnetic material

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Magnetism and Electromagnetism
The induced voltage across a stationary conductor in a stationary magnetic field is

decreased
increased
zero
reversed in polarity

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