MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The collector current is 2.945A and α=0.98. The leakage current is 2µA. What is the emitter current and base current? |
| A. | 3mA and 55µA |
| B. | 2.945mA and 55µA |
| C. | 3.64mA and 33µA |
| D. | 5.89mA and 65µA |
| Answer» B. 2.945mA and 55µA | |
| 2. |
A small signal source V(t)=Acos20t+Bsin10000t, is applied to a transistor amplifier as shown. The transistor has β=150 and hie=3KΩ. What will be the VO? |
| A. | 1500(Acos20t+Bsin10000t) |
| B. | -150(Acos20t+Bsin10000t) |
| C. | -1500Bsin10000t |
| D. | -150Bsin10000t |
| Answer» E. | |
| 3. |
The voltage gain of given circuit below is_________ |
| A. | 100 |
| B. | 20 |
| C. | 10 |
| D. | 30 |
| Answer» D. 30 | |
| 4. |
For an NPN transistor connected as shown in below, VBE=0.7V. Give that reverse saturation current of junction at room temperature is 10-13A, the emitter current is_________ |
| A. | 30mA |
| B. | 39mA |
| C. | 29mA |
| D. | 49mA |
| Answer» E. | |
| 5. |
A common emitter transistor amplifier has a collector current of 10mA, when its base current is 25µA at the room, temperature. What is input resistance? |
| A. | 3kΩ |
| B. | 5kΩ |
| C. | 1kΩ |
| D. | 7kΩ |
| Answer» D. 7kΩ | |
| 6. |
For the amplifier circuit of fig. The transistor has β of 800. The mid band voltage gain VO/VI of the circuit will be_________ |
| A. | 0 |
| B. | <1 |
| C. | =1 |
| D. | 800 |
| Answer» D. 800 | |