Question

On Magnetism is Depict the following with
the help of a diagram
a) magnetism is highest as poles of magnet​

Answer 1

Answer:

Magnetic Field,

The term magnetism comes from the region of Magnesia, a city in Western Turkey, where Greeks found lodestones, which attracted iron pieces across the space. It is also observed that, magnets attract as well as repel. We can explain this dual nature of magnetic force by proposing that each magnet has two poles, north pole (N) and south pole (S). You will observe two things during the activities:

1) When two magnets are brought near each other, like poles repel; opposite poles attract.

2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.

We like to represent this force effect of a magnet on iron-like objects with a concept called magnetic field. The concept of field can be best understood if we remember the gravitational force of Earth on object near it. We say that the mere presence of Earth sets up gravitational field in the surrounding space, and that we can represent this gravitational force effect with lines starting from Earth and radially diverging away to infinity.

Answer 2

Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). ... Like poles repel; unlike poles attract. Electric field points in the direction of the force experienced by a positive charge. The magnetic field is strongest at the poles, where the field lines are most concentrated. Field lines also show what happens to the magnetic fields of two magnets during attraction or repulsion. Their movement generates an electric current and causes each electron to act like a microscopic magnet. ... When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.  If you have two magnets next to each other and their north poles are facing each other or their south poles are facing each other, you can see that the field lines move away from each other, so you feel a repelling force between the two magnets. The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.