| 1 |
Diodes are used to. |
- A. Convert A.C. into D.C
- B. Convert D.C into A.C
- C. Store Charge
- D. Change voltage
|
| 2 |
The frequency of the carrier waver used of radio transmission: |
- A. 30 KHZ
- B. 40 KHZ
- C. 50 KHZ
- D. 60 KHZ
|
| 3 |
the number of (101)<sub>10</sub> in decimal is equal to .......... inbinary. |
- A. 0101111
- B. 0000101
- C. 10101101
- D. 1100101
|
| 4 |
The substances through which current con not pass are called: |
- A. Semi - conductors
- B. Insulators
- C. conductors
- D. non - metal
|
| 5 |
The current flow from p-type semi conductors is due to. |
- A. Free electrons
- B. Valance electrons
- C. Doping
- D. Hole
|
| 6 |
Word"Computer" is derive from. |
- A. Machine
- B. Calculator
- C. Compute
- D. All of these
|
| 7 |
Which of the following is used as rectifier; |
- A. semi - conductor diode
- B. resistors
- C. capacitors
- D. Germanium
|
| 8 |
Word FAX is short form of. |
- A. Facsiline
- B. Facsimile
- C. Fasimile
- D. None of these
|
| 9 |
Purose of electron gun in TV is to. |
- A. Fire electron
- B. Receive electron
- C. Consume electron
- D. Display picture
|
| 10 |
analogue signal is recorded on. |
- A. Magnetic tape
- B. Floppy disk
- C. Hard Disk
- D. C.D
|
