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The value of {magnetic susceptibility for super-conductors is :-
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Important Questions on Matter and Magnetism
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The correct I–H curve for paramagnetic materials is :
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The total magnetic flux in a material of area A, which produces a pole of strength mp when placed in a magnetic field of strength H, will be :-
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The magnetic susceptibility of a paramagnetic substance is 3 × 10–4. It is placed in a magnetising field of 4 × 104 A/m. The intensity of magnetisation will be:-
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The volume susceptibility of a magnetic material is 30 × 10–4. Its; relative permeability will be :-
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The magnetic moment of a magnet of mass 75 gm is 9 × 10–7 A-m2. If the density of the material of magnet is 7.5 × 103 kg/m3 then intensity of magnetisation will be :-
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The area of hysteresis loop of a material is equivalent to 250 Joule/m3. When 10 kg material is magnetised by an alternating field of 50Hz then energy lost in one hour will be if the density of material is 7.5 gm/cm3.
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The coercivity of a bar magnet is 100A/m. It is to be demagnetised by placing it inside a solenoid of length 100 cm and number of turns 50. The current flowing the solenoid will be :
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Which of the following conclusions can be drawn from the result?
