The magnetic field of earth can be model...

The magnetic field of earth can be modelled by that of a point placed at the centre of the earth the dipole axis makes an angle of `11.3^(@)` with the axis of earth at mumbai declination is nearly zero then

the declination variis between `11.3^(@)` w to `11.3^(@)` e

the least declination is `0^(@)`

the plane defoned by dipole axis and earth axis passes throgh green wich

declination averaged over eath must be always negative

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