physics -magnets and electromagnetism cp10 p2

Question 1

what metals are magnetic

Answer 1

iron, steel, cobalt and nickel

Question 2

which way do field lines travel

Answer 2

-Field lines point from North to South.

Question 3

how is magnetism induced

Answer 3

If a block of iron is placed next to a magnet, it will become a
temporary magnet and can attract objects like paper clips.
When the block is moved away from the magnet it loses its
magnetism.

Question 4

what is the right hand rule

Answer 4

Thumb = current direction and finger= field direction

Question 5

what is a solenoid

Answer 5

-This is a coil of wire with a current flowing in it.
-It has a similar magnetic field to a bar magnet.

Question 6

3 ways in which an electromagnet can be made stronger

Answer 6

1. Adding more coils of wire
2. Increasing the current
3. Adding an iron core in the coils

Question 7

what happens when magnetic fields interact

Answer 7

If the field of an electromagnet is in the field of a
permanent magnet, the fields interact,
-This is known as the kicking wire or motor
effect

Question 8

fleamings left hand rule

Answer 8

thumb- force
index -magnetic field
middle -current

Question 9

how can the size of a force be made bigger

Answer 9

with a larger current, stronger magnet and more coils.