| 1 |
Revolutionary charges have occur in last ............. years. |
|
| 2 |
English word "9" has been divided into ............ segments. |
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| 3 |
Electric signal is converted into digital signal by. |
- A. Key board
- B. Monitor
- C. Scanner
- D. Modem
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| 4 |
Diodes are used to. |
- A. Convert A.C. into D.C
- B. Convert D.C into A.C
- C. Store Charge
- D. Change voltage
|
| 5 |
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
|
| 6 |
The frequency of the carrier waver used of radio transmission: |
- A. 30 KHZ
- B. 40 KHZ
- C. 50 KHZ
- D. 60 KHZ
|
| 7 |
The examples of semi - conductors: |
- A. sodium and potassium
- B. calcium and potassium
- C. Germanium and silicon
- D. carbon and nitrogen
|
| 8 |
Who was the inventor of radio system. |
- A. Grahm bell
- B. F. Crick
- C. Charles babbage
- D. Marconi
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| 9 |
Which element is used to make LED? |
- A. Aluminum
- B. Calcium
- C. sodium
- D. Arsenic
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| 10 |
Digital singles are represented by; |
- A. zero and 1
- B. zero and 10
- C. 1 and 2
- D. o and 9
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