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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Aluminium
Copper
Soft iron
Brass

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Magnetism and Electromagnetism
The unit for reluctance is

Wb
tesla
At/m
At/Wb

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Magnetism and Electromagnetism
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

remains constant
increases
decreases
reaches zero

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Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

BLI
None of the listed here
BLI2
Zero

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Magnetism and Electromagnetism
The unit for permeability is

At/Wb
At/m
Wb
Wb/At × m

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

111 At/Wb
1111 At/Wb
1 At/Wb
11 At/Wb

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