| 1 |
Which of the following is used as rectifier; |
- A. semi - conductor diode
- B. resistors
- C. capacitors
- D. Germanium
|
| 2 |
The current flow from p-type semi conductors is due to. |
- A. Free electrons
- B. Valance electrons
- C. Doping
- D. Hole
|
| 3 |
The frequency of the carrier waver used of radio transmission: |
- A. 30 KHZ
- B. 40 KHZ
- C. 50 KHZ
- D. 60 KHZ
|
| 4 |
In P-type semi -conductior, most of the current is due to. |
- A. Free electron
- B. Holes
- C. Positive ions
- D. Heat
|
| 5 |
in binary system. 37 is written as. |
- A. 101101
- B. 100101
- C. 110011
- D. 101011
|
| 6 |
Which element is used to make LED? |
- A. Aluminum
- B. Calcium
- C. sodium
- D. Arsenic
|
| 7 |
Which of the following is an input device: |
- A. key board
- B. printer
- C. monitor
- D. CPU
|
| 8 |
Purose of electron gun in TV is to. |
- A. Fire electron
- B. Receive electron
- C. Consume electron
- D. Display picture
|
| 9 |
Word FAX is short form of. |
- A. Facsiline
- B. Facsimile
- C. Fasimile
- D. None of these
|
| 10 |
Operation " 2+3" in computer performed by. |
- A. CU
- B. CPU
- C. ALU
- D. None of these
|
