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Flashcards in 12 Deck (22)
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1
Q

What can magnets be made from?

A
  • iron
  • nickel
    -cobalt.
    (NOT COPPER!!!)
2
Q

What are the two ends of magnets called?

A

North and south.

3
Q

Opposites do what?

A

Attract.

4
Q

2 norths, or two souths do what?

A

Repel.

5
Q

What type of force is magnetism?

A

Non contact force.

6
Q

What is a magnetic field?

A

An area around a magnet were magnetic objects feel a force.

7
Q

How can you find out the shape of a magnetic field?

A

By using iron filings.

8
Q

What is a permanent magnet?

A

A magnet which is a magnet all the time.

9
Q

What is a induced magnet?

A

A magnetic material which is a magnet only when inside a magnetic field.

10
Q

Uniform field.

A

Parallel lines were each all lines are the same and have equal force apron them.

11
Q

A bar magnet:

A

-a non-uniform magnet. With weird lines, (see book)

12
Q

2 strange things about the earths magnetic field:

A
  • the top of the earth is south and the bottom is north.

- the magnetic field doesn’t exactly hit the poles.

13
Q

What factors effect the magnetic strength?

A
  • number of turns on the coil.
  • current in the wire.
  • material of the core.
14
Q

How do you increase the reliability?

A
  • repeat the experiment and find the mean result.

- increase the range of the data using smaller intervals.

15
Q

Right hand thumb rule shows what?

A

It shows were the magnetic field around the wire is.

16
Q

How to use the right hand thumb rule.

A
  • Hand into a claw type position.
  • point thumb in the same direction as the current.
  • then fingers show the direction of the magnetic field.
17
Q

What is a motor effect?

A

Where a force is produced when a current flows inside a magnetic field.

18
Q

What is a solenoid?

A

A coil of wire with a current going through it.

19
Q

Where is the current strongest in a solenoid?

A

In the middle as all field lines go the same way, so the force is stronger there. (To understand draw out diagram and use right hand rule.)

20
Q

What does the Fleming left hand rule show?

A

It shows were the force would push or pull an object.

21
Q

What do the fingers represent in the Fleming left hand rule?

A

Thumb - force
1st finger - magnetic field attraction lines direction.
2nd finger - direction of current.

22
Q

How to form the Fleming left hand rule.

A

Gun fingers (if ur a real raver) then move 2nd finger 90 degrees clockwise.