12.1-12.6 Magnets and Magnetic fields

Question 1

Do unlike magnetic poles attract or repel?

Answer 1

Attract

Question 2

Do like magnetic poles attract or repel?

Answer 2

repel

Question 3

Which four metals are magnetic?

Answer 3

Iron,Steel,Nickel and Cobalt

Question 4

Give a use of a permanent magnet

Answer 4

.Refigerator magnet

.Jewelry making

Question 5

What’s the difference between a permanent and induced magnet?

Answer 5

Permanent magnets are always magnetic and have poles, Induced magnets are materials that are magnetic but don’t always have poles

Question 6

Which way do field lines point?

Answer 6

North to South

Question 7

What happens to the field strength of a magnet the further away you get?

Answer 7

Decreases

Question 8

What key features does a diagram showing the magnet field around a bar magnet show?

Answer 8

.Magnetic field lines never cross each other
.The closer the lines the closer the magnetic field
.The lines have arrowheads to show the direction of a force
.The arrowheads point from the North Pole to the South Pole

Question 9

What is the use of a plotting compass?

Answer 9

To show the shape and direction of a field around a magnet

Question 10

How do we know the Earth’s core is magnetic?

Answer 10

.A freely suspended magnetic compass will align itself with the Earth’s field lines and point North