GEOLOGY

Detailed explanation-1: -We can magnetize the chunk of iron by wrapping electric wires around it. By leaving it for a while makes the electron movement in a particular direction. This will produce a magnetic field stated by the left-hand rule. This can make ferrous materials magnetize.

Detailed explanation-2: -A bar of steel or iron can be magnetised by placing it in a coil of wire (solenoid). Passing a d.c. (direct current) through the wire will magnetise the bar.

Detailed explanation-3: -In this method one end of the magnet (say north pole) is placed at one end (say end A) of the iron piece and then rubbed over the bar from end to other (say end B), then lifted and brought back to first end. This process is repeated for few times.

Detailed explanation-4: -In the unmagnetized steel, the domains are pointing in all directions. When you stroke a magnet repeatedly across the steel in a given direction, the domains line up in the same direction. The steel becomes a magnet.