GEOLOGY

Detailed explanation-1: -False. Hint: Earth has two geographic poles, North pole and South pole. Also earth has two magnetic poles of North and South.

Detailed explanation-2: -But some magnets have more than two poles. In fact, some have four, or six, or even eight!

Detailed explanation-3: -Anyway, the earth has two dominant magnetic poles, and several very weak ‘quadrupolar’ poles of which there are, at least mathematically, about 8 in number. These poles are far weaker than the dipole field, and measure only weak departures of the local geographic field strength from the basic dipolar North-South field.

Detailed explanation-4: -Solution: (i) False; A magnet of any shape always has two poles: a north pole and south pole.

Detailed explanation-5: -At Earth’s surface, the magnetic field forms two poles (a dipole). The north and south magnetic poles have opposite positive and negative polarities, like a bar magnet.