| 1 |
Which of the following is a brain of computer? |
- A. Central processing unit
- B. Mouse
- C. Monitor
- D. Hard disc
|
| 2 |
analogue signal is recorded on. |
- A. Magnetic tape
- B. Floppy disk
- C. Hard Disk
- D. C.D
|
| 3 |
The substances through which current can pass easily are called: |
- A. conductors
- B. insulators
- C. Semi - conductors
- D. Non - Electrolytes
|
| 4 |
Which of the following is used as rectifier; |
- A. semi - conductor diode
- B. resistors
- C. capacitors
- D. Germanium
|
| 5 |
Which element is used to make LED? |
- A. Aluminum
- B. Calcium
- C. sodium
- D. Arsenic
|
| 6 |
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
|
| 7 |
Diodes are used to. |
- A. Convert A.C. into D.C
- B. Convert D.C into A.C
- C. Store Charge
- D. Change voltage
|
| 8 |
Operation " 2+3" in computer performed by. |
- A. CU
- B. CPU
- C. ALU
- D. None of these
|
| 9 |
Which of the following are electromagnetic waves: |
- A. sound
- B. water waves
- C. Ultrasound
- D. light
|
| 10 |
Which of the following is an input device: |
- A. key board
- B. printer
- C. monitor
- D. CPU
|
