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Criado por joan.march
mais de 10 anos atrás
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Questão | Responda |
The two magnetic poles | North and south |
The three principal magnetic metals | Iron, Nickel and Cobalt. Extra: sometimes steel as it is mixed with iron. |
How can non-magnetic metals be made magnetic | By making all the electrons face the same way |
What do two poles that are the same do when they are brought together? | Repel |
What do two unlike poles do when they are put close together? | Attract |
Two ways in which you can increase the strength of an electromagnet? | By increasing the voltage and the amount of coils around it |
What is good about electromagnets? | That you can control them. Make them magnetic and non-magnetic when you want. |
One way an electromagnet can be used and why is it useful? | In a scrap heap magnet to separate the magnetic and non-magnetic metals into two. |
One piece of evidence to prove that earth acts like a giant magnet. | It has North and South and has a melted liquid core which contains iron (magnetic metal). |
What happens if a magnet is cut in half? | The only difference is that it's made smaller but it will still have a north and a south |
Will a magnetised metal last long being magnetic if it has been made magnetic by another metal? | It depends if the person has been rubbing the magnet for a long time and IN THE SAME DIRECTION all the time but it will probably not last long as the atoms will go back to their original position |
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