Methods that can be used to magnetise a steel rod?

1. Stroke Method: Rub a magnet along the length of the steel rod in the same direction multiple times. This will align the magnetic domains in the steel and magnetize it.

2. Induction Method: Place the steel rod inside a coil of wire and pass an electric current through the coil. This will create a magnetic field that will magnetize the steel rod.

3. Hammering Method: Place the steel rod on a hard surface and strike it with a hammer while it is in contact with a magnet. The impact of the hammering will help align the magnetic domains in the steel and magnetize it.

4. Heating and Cooling Method: Heat the steel rod to a high temperature and then cool it rapidly in the presence of a magnetic field. This process, known as quenching, can help align the magnetic domains in the steel and magnetize it.

5. Electromagnetic Method: Place the steel rod inside a solenoid (a coil of wire) and pass an electric current through the coil. The magnetic field generated by the current in the coil will magnetize the steel rod.

- Electromagnetism: Passing an electric current through a coil wrapped around the steel rod will create a magnetic field that will magnetise the rod.
- Permanent magnet: Placing a permanent magnet near the steel rod will induce magnetism in the rod.
- Magnetic induction: Placing the steel rod in a magnetic field created by another magnet will induce magnetism in the rod.
- Annealing: Heating the steel rod to a high temperature and then cooling it slowly in the presence of a magnetic field will magnetise the rod.
- Mechanical deformation: Applying a strong mechanical force to the steel rod, such as hammering or bending, can induce magnetism in the rod.