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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

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

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Magnetism and Electromagnetism
Susceptibility is positive for

ferromagnetic substances
non-magnetic substances
None of these
diamagnetic substances

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Magnetism and Electromagnetism
The unit for reluctance is

At/m
tesla
Wb
At/Wb

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Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

Decreases
Increases
None of the listed here
Remain same

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Stainless steel
Hardened steel
None of the listed here
Soft iron

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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?

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

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