| 1 |
Which element is used to make LED? |
- A. Aluminum
- B. Calcium
- C. sodium
- D. Arsenic
|
| 2 |
The major function of electronic devices is to amplify the ........ signals. |
- A. Stronge electric
- B. Semi strong electric
- C. Both a and c
- D. weak electric
|
| 3 |
Word FAX is short form of. |
- A. Facsiline
- B. Facsimile
- C. Fasimile
- D. None of these
|
| 4 |
analogue signal is recorded on. |
- A. Magnetic tape
- B. Floppy disk
- C. Hard Disk
- D. C.D
|
| 5 |
in binary system. 37 is written as. |
- A. 101101
- B. 100101
- C. 110011
- D. 101011
|
| 6 |
Which of the following are electromagnetic waves: |
- A. sound
- B. water waves
- C. Ultrasound
- D. light
|
| 7 |
Which of the following is an input device: |
- A. key board
- B. printer
- C. monitor
- D. CPU
|
| 8 |
The deficiency of elctrons in outermost shell of silicon atom is called. |
- A. Valent shell hole
- B. Doping
- C. Hole
- D. None of these
|
| 9 |
Hovering satellite completes its rotation in 24 hours at the height of: |
- A. 360 km
- B. 3600 km
- C. 36000 km
- D. 360000 km
|
| 10 |
In P-type semi -conductior, most of the current is due to. |
- A. Free electron
- B. Holes
- C. Positive ions
- D. Heat
|
