P3 Flashcards
1
Q
Why are electromagnets useful?
A
As their magnetism can be switched off.
2
Q
What is Flemings left hand rule?
A
Left thumb motion.
First finger field
Second finger current
3
Q
Which two factors speed up an simple electric motor?
A
More current
Stronger magnetic field
4
Q
What is a magnetic field?
A
It is a region where magnetic materials and also wires carrying currents experience a force on them.
