nursing AIIMS BSc Nursing 2025 Mock Test Series Physics Magnetism and Maxwell's Equations The Earth’s Magnetism
The magnetic field of 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,
1
the declination varies between 11.3° W to 11.3° E.
2
the least declination is 0°.
3
the plane defined by dipole axis and Earth axis passes through Greenwich.
4
declination averaged over Earth must be always negative.