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why earth can be considerd as a huge bar magnet.

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Knowledge Check

  • Obtain the Earth’s magnetisation assuming that the Earth’s field can be approximated by a giant bar magnet of magnetic moment 8.0xx10^22Am^2 .The Earth 's radius is 6400 km.

    A
    `7.9xx10^5A//m`
    B
    `73A//m`
    C
    `1.8xx10^-6A//m`
    D
    `1.0A//m`

  • Select the correct statement: (I) Two field lines can not cross each other (II) Monopoles are responsible for magnetic field (III) Earth's magnetic field is greater than bar magnet field

    A
    (II) only
    B
    (I) and (II)
    C
    (I) only
    D
    (III) and (I)

  • A short bar magnet is placed along N-S direction with N pole pointing north. The neutral points are located 20 cm away from the bar magnet. If B_(H) is the horizontal component of earth's magnetic field then the magnetic field due to the bar magnet at distance of 40 cm along its axis is

    A
    `(B_(H))/(2)`
    B
    `(B_(H))/(4)`
    C
    `(B_(H))/(8)`
    D
    `(B_(H))/(16)`

    • Similar Questions

    Explore conceptually related problems

    The earth's magnetism can be considered similar to that of a huge bar magnet

    How can the earth be considered a magnet when the exact cause for its magnetism cannot be ascertained?

    How many neutral points can be obtained in a given plane perpendicular to the length of the two parallel wires conducting current in the same direction ? Explain, neglect earth's magnetic field of a bar magnet NS.

    Why are the magnetic poles of a bar magnet not situated at the ends, but located slightly inside ? (or) why is the effective length of a bar magnet different from its actual length

    Define magnetic field of a bar magnet.

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