| 1 |
The examples of semi - conductors: |
- A. sodium and potassium
- B. calcium and potassium
- C. Germanium and silicon
- D. carbon and nitrogen
|
| 2 |
Which disk consisting of metal plates for recording. |
- A. Floopy
- B. RAM
- C. HARD
- D. CD
|
| 3 |
The elements used to increase the number of free electrons in the semi - conductor belong to: |
- A. 2<sup>nd</sup> group
- B. 3<sup>rd</sup> group
- C. 4<sup>th</sup> group
- D. 5<sup>th</sup> group
|
| 4 |
Which of the following is used as rectifier; |
- A. semi - conductor diode
- B. resistors
- C. capacitors
- D. Germanium
|
| 5 |
Revolutionary charges have occur in last ............. years. |
|
| 6 |
The current flow from p-type semi conductors is due to. |
- A. Free electrons
- B. Valance electrons
- C. Doping
- D. Hole
|
| 7 |
Which of the following are electromagnetic waves: |
- A. sound
- B. water waves
- C. Ultrasound
- D. light
|
| 8 |
In P-type semi -conductior, most of the current is due to. |
- A. Free electron
- B. Holes
- C. Positive ions
- D. Heat
|
| 9 |
Which element is used to make LED? |
- A. Aluminum
- B. Calcium
- C. sodium
- D. Arsenic
|
| 10 |
English word "9" has been divided into ............ segments. |
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