TS EAMCET 11-Sep-2020 Shift 1 Solved Paper

Given, m= magnetic dipole moment of earth
r= radius of earth
It is assumed that earth has a bar magnet inside it.
Hence, magnetic field at any point on equitorial line of earth's bar magnet is given as,
B=‌

µ0

4π

⋅‌

m

r3