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The magnetic field at a point in air is ...

The magnetic field at a point in air is `8.8xx10^(-6)T` and the magnetic intensity ( in `A.m^(-1)` ) is (n+0.006) . What is the value of n ? Take `pi` be 3.14.

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Knowledge Check

  • Relation between the magnetic field vector vec(B) and magnetic intensity vec(H) at a point in a magnetic field vec(B)=muvec(H) where mu is the mangnetic permeability of the medium in which the point is situated . Magnetic permeability of vacuum mu_(0)=4pixx10^(-7)H.m^(-1) . Thus the relative magnetic permeability of the medium mu_(r)-(mu)/(mu_(0)) . To define the magnetic field at a point in a medium another vector needs mention , which is magnetisation vec(M) . The magnetic field is known as the magnetisation of the point . In most cases vec(M)propvec(H) " or, "vec(M)=kvec(H), this k is called the magnetic susceptibility of the medium . The relation among these vectors is expressed as vec(B)=mu_(0)(vec(H)+vec(M)) . Magnetisation at a point in the medium is 0.002A.m^(-1) . The intensity at the point is (in A.m^(-1) )

    A
    `2.52xx10^(-9)`
    B
    `6xx10^(-6)`
    C
    `0.667`
    D
    `1.5`

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