Given, Horizontal component of earth's magnetic field BH=20µT Natural point of distance, d=20cm =20×10−2m Since, North pointing towards North. Hence, magnetic field at equator of dipole B is B‌‌=‌
µ0
4Ï€
‌
M
d3
⇒‌‌M‌‌=‌
4Ï€Bd3
µ0
where, M is magnetic dipole moment and µ0=4π×10−7H∕m ⇒‌‌M‌‌=‌