The earth's magnetic field lines resemble that of a dipole at the centre of the earth. If the magnetic moment of this dipole is close to $8 \times 10^{22}\, Am^2$, the value of earth 's magnetic field near the equator is close to....$Gauss$ (radius of the earth $= 6.4 \times 10^6\, m$)

  • [JEE MAIN 2013]
  • A

    $0.6$

  • B

    $1.2$

  • C

    $1.8$

  • D

    $0.32$

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