| 1 |
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
|
| 2 |
English word "9" has been divided into ............ segments. |
|
| 3 |
In Pure -semi conductors no free electrons are available to conduct electric current at. |
- A. Ordinary temperature
- B. Low temperature
- C. High temperature
- D. None of these
|
| 4 |
Which of the following are electromagnetic waves: |
- A. sound
- B. water waves
- C. Ultrasound
- D. light
|
| 5 |
How many electrons Guns are used in colour T.V? |
- A. One
- B. Two
- C. Three
- D. Four
|
| 6 |
The frequency of the carrier waver used of radio transmission: |
- A. 30 KHZ
- B. 40 KHZ
- C. 50 KHZ
- D. 60 KHZ
|
| 7 |
In P-type semi -conductior, most of the current is due to. |
- A. Free electron
- B. Holes
- C. Positive ions
- D. Heat
|
| 8 |
The examples of semi - conductors: |
- A. sodium and potassium
- B. calcium and potassium
- C. Germanium and silicon
- D. carbon and nitrogen
|
| 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 |
The speed of radio wave is: |
- A. Light
- B. Air
- C. Sound
- D. Rocket
|
