| 1. | Pure silicon is ? | |
|
a p-type semiconductor
|
||
|
an n-type semiconductor
|
||
|
an intrinsic semiconductor
|
||
|
an extrinsic semiconductor
|
||
View Answer
Discuss in Forum
Report Question| 2. | If a small amount of phosphorus is added to germanium, then: ? | |
|
The conductivity decreases
|
||
|
Silicon becomes a P-type semiconductor
|
||
|
Phosphorus becomes an acceptor impurity
|
||
|
There will be more free electrons than holes
|
||
| 3. | An intrinsic semiconductor at 0 K behaves as: 0 K ? | |
|
A semiconductor
|
||
|
An insulator
|
||
|
A conductor
|
||
|
A superconductor
|
||
| 4. | N-type semiconductors are formed by adding ? | |
|
Divalent impurities to pure semiconductor
|
||
|
Trivalent impurities to pure semiconductor
|
||
|
Tetravalent impurities to pure semiconductor
|
||
|
Pentavalent impurities to pure semiconductor
|
||
| 5. | In a semiconductor diode schematic symbol arrow head represents ? | |
|
N-type material
|
||
|
P-type material
|
||
|
both P and N-type materials
|
||
|
none of the above
|
||
| 6. | Purest from of semiconductor are called ? | |
|
Intrinsic
|
||
|
Diodes
|
||
|
Extrinsic
|
||
|
Transistor
|
||
| 7. | Semiconductor material have ? | |
|
ionic bands
|
||
|
covalent bonds
|
||
|
mutual bonds
|
||
|
metallic bonds
|
||
| 8. | Electron mobility of the following intrinsic elements in descending order is ? | |
|
GaAs, Si, Ge
|
||
|
Si, Ge, GaAs
|
||
|
GaAs, Ge, Si
|
||
|
Ge, Si, GaAs
|
||
| 9. | When a normal atom looses an electron ? | |
|
Atom looses one proton simultaneously
|
||
|
Rest of the electrons move faster
|
||
|
Atom becomes a positive ion
|
||
|
Atoms become a negative ion
|
||
| 10. | An electron in the conduction band ? | |
|
Is always chargeless
|
||
|
Has tendency to leave the atom
|
||
|
Has lower energy than an electron in the valence band
|
||
|
Has higher energy than an electron in the valence band
|
||