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NEET-XII-Physics

37: Magnetic Properties of Matter

with Solutions - page 2
Qstn# iv-2-a Prvs-QstnNext-Qstn
  • #2-a
    What is the magnetic intensity H at the centre? (b) If the magnetization I of the core is found to be 0.12 A m-1, find the susceptibility of the material of the rod. (c) Is the material paramagnetic, diamagnetic or ferromagnetic?
    Ans : Intensity of magnetisation, H = 1500 A/m
    As the solenoid and the rod are long and we are interested in the magnetic intensity at the centre, the end effects may be neglected.
    The sole effect of the rod in the magnetic field of the solenoid is that a magnetisation will be induced in the rod depending on rod magnetic properties.
    There is no effect of the rod on the magnetic intensity at the centre. (b) Magnetisation of the core, I = 0.12 A/m
    We know:
    `` I=\chi H``,
    where `` \chi `` is the susceptibility of the material of the rod.
    `` \therefore \chi =\frac{I}{H}=\frac{0.12}{1500}``
    `` =0.00008=8\times {10}^{-5}`` (c) The material is paramagnetic.
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  • #2-b
    If the magnetization I of the core is found to be 0.12 A m-1, find the susceptibility of the material of the rod.
    Ans : Magnetisation of the core, I = 0.12 A/m
    We know:
    `` I=\chi H``,
    where `` \chi `` is the susceptibility of the material of the rod.
    `` \therefore \chi =\frac{I}{H}=\frac{0.12}{1500}``
    `` =0.00008=8\times {10}^{-5}``
  • #2-c
    Is the material paramagnetic, diamagnetic or ferromagnetic?
    Ans : The material is paramagnetic.
    Page No 286: