Magnetism

Question 1

What are the ens of a magnet called?

Answer 1

= poles - north and south

Question 2

What does the law of magnetism state?

Answer 2

= two like poles repel each other and two unlike poles attract each other.

Question 3

What is the attraction or repulsion of two poles called?

Answer 3

= non-contact force

Question 4

What metals in the periodic table are magnetic?

Answer 4

= iron, cobalt, nickel

Question 5

Is steel magnetic?

Answer 5

= yes as its an alloy which contains iron.

Question 6

How do you test if a material is magnetic?

Answer 6

• bring material to a magnet
• if its repelled by the magnet then the material itself is a magnet.
• if it can only be attracted and not repelled then its a magnetic material.

Question 7

What are the types of magnet?

Answer 7

= permanent and induced

Question 8

What are permanent magnets?

Answer 8

• made out of magnetic materials for example steel
• it will produce its own magnetic field and wont loose its magnetism.

Question 9

What is an induced magnet?

Answer 9

• when a magnetic materials is placed in a magnetic field it can become temporarily a magnet.
• one end will become ea North Pole and the other the south.

Question 10

What is magnetic field described as?

Answer 10

= the region around a magnet where a force acts on another magnet or on a magnetic material

Question 11

What are magnetic field lines used for?

Answer 11

= they represent the strength and direction of a magnetic field.

Question 12

What is the strength of the magnetic field show by?

Answer 12

• the spacing Of the lines
• if they are close together then the magnetic filed will be strong
• if they are far apart then it is weak.

Question 13

What are the rules when drawing magnetic field lines?

Answer 13

• the direction of the field lines must always be north to south
• the lines must never touch or cross.