Who discovered the earth magnetic field?, William gilbert, mangus, Benjamin franklin, the use of magnetic , used to find the directions, to contain domain, How we can make a magnet, by repeatealy storking without a piece of metal with one end of a bar magnet as shown in the diagram with one end of a bar magnet as shown in the diagramwith one end of a bar magnet as shown in the diagram, repeatealy storking with a piece of metal with one end of a bar magnet as shown in the diagram, What are the electromagnets?, particularly useful because they can be turned on and off, short pulses of electrical charge that pass along nerve , Where do we found the electromagnets?, relays, key, what is the magnetized iron ?, contains domains {cells} which are all pointed at the same direction so it becomes effective,, the domains are all pointing in different directions so its non effective to magnets, where does the word (magnet )came from , from a young boy called magnus, from a rock called magnus , what are the metals that can be attracted by magnets ?, iron and steel , iron and paper,  how we can increase the strength of an electromagnets ?, by increasing the number of coils , by dont increasing the numbers of coils , by dont increasing the soler noid , what happens when the curent is turned off, magentic field doesnt disappears , the magnetic field disappears and iron looses all its magnetic , magnetic doesnt loos the magnet , can we see a magnetic field ?, no we cant see it but we can see its effects , we can see magnetic field but we cant see it effects , yes we can see it and its effects , the meaning of attraction in arabic ?, تجاذب , تنافر , the meaning of magnetic in arabic , لا يمكنه التجاذب مع المغناطيس , يمكنه التجاذب مع المغناطيس , the meaning of poles in arabic , اقطاب , اعمدة , the meaning of magnetic domain in arabic, المجال المغنطيسي , المغنطيس.

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