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Magnetism and Matter - 04
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Q1. If μ0 is absolute permeability of vacuum and μr is relative magnetic permeability of another medium, then permeability μ of the medium is
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1 point
b
d
a
c
Q2. Which of the following is not correct about relativemagnetic permeability (μ,)?
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It is a dimensionsless pure ratio.
For vacuum medium its value is one.
For ferromagnetic materials μ, > > 1
For paramagnetic materials μ, > 1
Q3. Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called
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diamagnetic
antimagnetic
ferromagnetic
paramagnetic
Q4. The magnetic susceptibility for diamagnetic materials is
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small and negative
small and positive
large and positive
large and negative
Q5. Which magnetic materials have negative susceptibility?
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diamagnetic materials
paramagnetic materials
ferromagnetic materials
All the above
Q6. If a diamagnetic substance is brought near north or south pole of a bar magnet, it is
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attracted by north pole and repelled by south pole
replaced by north pole and attracted by south pole
repelled by poles
attracted by poles
Q7. Among which of the following the magnetic susceptibility does not depend on the temperature?
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Ferrite
Ferro-magnetism
Dia-magnetism
Para-magnetism
Q8. The narrowest hysterisis loop is for
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stainless steel
cobalt steel
alnico
perm alloy
Q9. The hysterisis curve is studied generally for
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ferromagnetic materials
paramagnetic materials
diamagnetic materials
None of them
Q10. Curie temperature is the temperature above which
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a ferromagnetic material becomes paramagenetic
a paramagnetic material becomes diamagnetic
a ferromagnetic material becomes diamagnetic
a paramagnetic meterial becomes ferromagnetic
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