- The magnetic field is a field generated by the electric charge or magnet in the motion.
- The magnetic field is the area around the moving electric charge or magnetic substance within which the force of magnetism operates.
- Using magnetic field lines, magnetic fields are described.
- It is a visual method used to visualise the path of the magnetic field and its strength.
- A bar magnet is a rectangular piece of an object that has permanent magnetic properties, composed of iron, steel or some other ferromagnetic material or ferromagnetic composite.
- It has two poles, a north and a south pole so that the magnet aligns itself while freely suspended so that the northern pole points to the earth’s magnetic north pole.
The compass needle is a small magnet. That’s why when a compass needle is brought near a bar magnet, its magnetic field lines interact with that of the bar magnet. Hence, a compass needle gets deflected near the magnet bar.