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Write an expression for magnetic field i...

Write an expression for magnetic field intensity at any point an axial line of a bar magnet.

Text Solution

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`B_1=(mu_0)/(4pi)(2Md)/((d^2-l^2)^2)`, along SN
where symbols have usual meaning.
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Knowledge Check

  • Statement-1: Magnetic field strength at a point on axial line of a bar magnet is along South to North pole of magnet. Statement-2: The magnetic field strength can never be along North to South pole of magnet.

    A
    Statement-1 is true, Statement-2 is true, Statement-2 is a correct explaination of Statement-1.
    B
    Statement-1 is true, Statement-2 is true, Statement-2 is not a correct explanation of Statement-1.
    C
    Statement-1 is true, Statement-2 is false.
    D
    Statement-1 is false, Statement-2 is true.

  • The magnetic field lines inside a bar magnet

    A
    Are from south pole to north pole of the magnet
    B
    Are from north pole to south pole of the magnet
    C
    Depend upon the area of cross section of the bar magnet
    D
    Depend upon the orientation of the bar magnet

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