Electrical current Flashcards
1
Q
Current
A
The rate of flow of charge
2
Q
Charge carriers
A
Particles that carry electric charge
3
Q
Which way does current go
A
+ -> -
4
Q
Which way do electrons flow
A
- -> +
5
Q
Insulator
A
Each electron is attached to an atom and cannot move away from the atom, so when voltage is applied no current passes as the electrons cannot move
6
Q
Metallic Conductor
A
Most atoms are attached to atoms but some are delocalised which are the charge carriers so are attracted to the positive terminal when voltage is applied
7
Q
Semiconductor
A
Number of charge carriers increases with temperature and resistance therefore decreases as temperature increases
