Lesson flashcards
1
Q
What does the thumb represent in the left hand rule?
A
Force
2
Q
How can you increase the strength of an electromagnet?
A
- Increase the current
- Increase number of coils
- Increase amount of iron
3
Q
What causes the motor effect?
A
A current carrying wire exerting force on a permanent magnet
4
Q
What advantage does an electromagnet have over a magnet?
A
It can be switched on and off
5
Q
What are the only magnetic elements?
A
Iron, nickel, cobalt and steel
6
Q
What is the only magnetic compound?
A
Steel
7
Q
Where are the magnetic forces on a magnet strongest?
A
The poles
8
Q
What is an induced magnet?
A
One that becomes magnetised when placed in a magnetic field
9
Q
What do field like patterns show?
A
Direction and shape of a magnetic field
10
Q
A
