| 1 |
The colour of light emitted by a LED depends on. |
- A. It forward biased
- B. Its reverse biased
- C. Unbiased
- D. None of these
|
| 2 |
Transistor was discovered by |
- A. Young
- B. Curie
- C. John Bardeen
- D. Shale's
|
| 3 |
The device which is used as amplifier and works with the negative feedback is. |
- A. Operational amplifier
- B. P-n-p transistor
- C. n-p-n transistor
- D. Transistor
|
| 4 |
The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of. |
- A. Ohms
- B. Kilo Ohms
- C. Mega Ohms
- D. Thounds Ohms
|
| 5 |
Which device is used as a rectifier? |
- A. Capacitor
- B. Transistor
- C. Diode
- D. Transformer
|
| 6 |
Base of transistor is of order: |
- A. 10<sup>-11</sup>m
- B. 10<sup>6</sup>m
- C. 10<sup>-8</sup>m
- D. 10<sup>-6</sup>m
|
| 7 |
Output resistance of an op amp is |
- A. High
- B. Low
- C. Zero
- D. Equal to input resistance
|
| 8 |
The output from a full wave rectifier is |
- A. An ac voltage
- B. A dc voltage
- C. Zero
- D. A pulsating unidirectional voltage
|
| 9 |
The ratio of potential barriers of Ge to Si at room temperatrue is. |
- A. 7:3
- B. 1:3
- C. 2:5
- D. 3:7
|
| 10 |
The term invertor is used for. |
- A. NOR gate
- B. XNOR gate
- C. NAND gate
- D. NOT gate
|
