Semiconductors Flashcards
1
Q
Solid materials have
A
Many atoms close together
2
Q
Electrons with a low energy band are in the
A
Valence band
3
Q
Electrons in a valence band are tied to atoms meaning
A
No electric current
4
Q
Electrons that gain energy jump up to the
A
Conduction band ( from the valence band)
5
Q
Electrons in the conduction band are
A
Delocalised and form a current
6
Q
Number of delocalised electrons in semi conductor is low compared to the metals meaning =
A
Lower current for same voltage
7
Q
More electrons in conduction band means =
A
More collisions with fixed atoms ( increase in conduction atoms is higher)
8
Q
Semi conductor carries more current as=
A
Temperature increases
9
Q
Temperature up =
A
Lower resistivity
