Simple phenomena of magnetism 0.0 / 5 ? ScienceSimple phenomena of magnetismIGCSECIE Created by: AIV17Created on: 17-04-21 09:39 Why magnetic forces occur? The interaction of magnetic fields 1 of 16 How can magnetic fields be represented? Field lines 2 of 16 What is a magnetic material? A material which experiences a force when placed in a field 3 of 16 Which are common magnetic materials? Iron, steel, nickel and cobalt 4 of 16 What are hard magnetic materials? A material that retains magnetism well, but is difficult to magnetise 5 of 16 What is an example of a hard material? Hard steel 6 of 16 What are soft magnetic materials? A material that is easy to magnetise and loses it easily 7 of 16 What is an example of a soft material? Soft iron 8 of 16 What are permanent magnets? Magnets that retain magnetism and are made of hard magnetic materials 9 of 16 What are electromagnets? A magnet that is made up of a solenoid, which creates a magnetic field with a current. They are soft materials 10 of 16 What is the difference between permanent magnets and electromagnets? An electromagnet can be turned on/off and its magnetic field can be reversed 11 of 16 How can the strength of an electromagnet be increased? Increase the current flowing, number of turns or add a soft iron core 12 of 16 How can a magnetic material be magnetised? Stroking it with a permanent magnet, putting it inside a coil with d.c. flowing through it or hammering it on a strong field 13 of 16 What is induced magnetism? The magnetisation of a magnetic material when placed on a field 14 of 16 What happens on induced magnetism? One end of the material becomes N and the other end becomes S 15 of 16 What happens once removed from the field? It will start to lose its magnetism depending on whether it is hard or soft 16 of 16
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