MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the maximum value of gain of an amplifier? |
| A. | 140dB |
| B. | 130dB |
| C. | 120db |
| D. | 100dB |
| Answer» D. 100dB | |
| 2. |
Which of the following is the equation for stray capacitance frequency? |
| A. | F<sub>H</sub> = 1/27R |
| B. | F<sub>H</sub> = 1/R |
| C. | F<sub>H</sub> = 54/27R |
| D. | F<sub>H</sub> = 11/27R |
| Answer» B. F<sub>H</sub> = 1/R | |
| 3. |
At higher frequency, the capacitance of an amplifier circuit is mainly because of which capacitance? |
| A. | Coupling capacitors |
| B. | Stray capacitance |
| C. | Resistors |
| D. | Inductors |
| Answer» C. Resistors | |
| 4. |
Which of the following is the necessary condition to design an amplifier? |
| A. | V<sub>ce</sub> <sup>1</sup> <sub>10</sub> of RC |
| B. | |V<sub>ce</sub>| <sup>1</sup> <sub>10</sub> of RC |
| C. | |V<sub>ce</sub>| <sup>1</sup> <sub>1000</sub> of RC |
| D. | |V<sub>ce</sub>| <sup>1</sup> <sub>100</sub> of RC |
| Answer» C. |V<sub>ce</sub>| <sup>1</sup> <sub>1000</sub> of RC | |
| 5. |
FET amplifier does not obey the law of conservation of energy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Which of the following is the main advantage of Self bias? |
| A. | Eliminates the need of two power supply |
| B. | Maximum stability |
| C. | Minimum stability |
| D. | Maximum & Minimum stability |
| Answer» B. Maximum stability | |
| 7. |
The action of JFET in its equivalent circuit can be represented as which of the following? |
| A. | Current controlled current source |
| B. | Current controlled voltage source |
| C. | Voltage controlled current source |
| D. | Voltage controlled Voltage source |
| Answer» D. Voltage controlled Voltage source | |
| 8. |
The pinch off voltage of JFET is 5v. What is its cut off voltage? |
| A. | 2.5V |
| B. | 3V |
| C. | 4V |
| D. | 5V |
| Answer» E. | |
| 9. |
Two identical FETs, each characterized by the parameters g_m and r_d are connected in parallel .The composite FET is then characterized by the parameters_____________ |
| A. | g<sub>m</sub>/2 and 2r<sub>d</sub> |
| B. | g<sub>m</sub>/2 and 2r<sub>d</sub> |
| C. | 2g<sub>m</sub> and r<sub>d</sub>/2 |
| D. | 2g<sub>m</sub> and r<sub>d</sub>/2 |
| Answer» D. 2g<sub>m</sub> and r<sub>d</sub>/2 | |