| 1 |
The current flow from p-type semi conductors is due to. |
- A. Free electrons
- B. Valance electrons
- C. Doping
- D. Hole
|
| 2 |
Purose of electron gun in TV is to. |
- A. Fire electron
- B. Receive electron
- C. Consume electron
- D. Display picture
|
| 3 |
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
|
| 4 |
The deficiency of elctrons in outermost shell of silicon atom is called. |
- A. Valent shell hole
- B. Doping
- C. Hole
- D. None of these
|
| 5 |
in binary system. 37 is written as. |
- A. 101101
- B. 100101
- C. 110011
- D. 101011
|
| 6 |
Which of the following is used as rectifier; |
- A. semi - conductor diode
- B. resistors
- C. capacitors
- D. Germanium
|
| 7 |
The elements used to increase the number of free electrons in the semi - conductor belong to: |
- A. 2<sup>nd</sup> group
- B. 3<sup>rd</sup> group
- C. 4<sup>th</sup> group
- D. 5<sup>th</sup> group
|
| 8 |
The speed of radio wave is: |
- A. Light
- B. Air
- C. Sound
- D. Rocket
|
| 9 |
Which of the following are electromagnetic waves: |
- A. sound
- B. water waves
- C. Ultrasound
- D. light
|
| 10 |
The numebr (100)16 in decimal is equal to............. in binary. |
- A. 1110100
- B. 01011101
- C. 1100100
- D. <u>1001001</u>
|
