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The magnetic field of earth can be earth...

The magnetic field of earth can be earth can be modelled by that of a point dipole 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

A

the declination varies between `11.3^(@)W " to " 11.3^(@)E`

B

the leat declination is `0^(@)`

C

the plane defined by the dipole axis and earth axis passes through Greenwich

D

declinaton averaged over earth must be always negative

Text Solution

Verified by Experts

The correct Answer is:
A
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