MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a CS amplifier, given that rds=0.5MΩ and gm=5mΩ-1, the load is 10kΩ, source resistance is 44 kΩ. Calculate the internal amplification factor for the small signal model. |
| A. | 2500 |
| B. | 8100 |
| C. | 9800 |
| D. | 7700 |
| Answer» B. 8100 | |
| 2. |
Which of these has an output which follows input? |
| A. | CS amplifier with a bypass capacitor |
| B. | CD amplifier |
| C. | CG amplifier |
| D. | CS amplifier without a bypass capacitor |
| Answer» C. CG amplifier | |
| 3. |
Which of these is false for a CS amplifier without a bypass capacitor compared to a CS amplifier with a bypass capacitor? |
| A. | Voltage gain magnitude decreases |
| B. | Input resistance remains same |
| C. | The output resistance decreases |
| D. | The output is 180° out of phase with respect to the input applied |
| Answer» D. The output is 180° out of phase with respect to the input applied | |
| 4. |
In a high-frequency model of a JFET, which of these capacitances is present? |
| A. | A and B |
| B. | A and C |
| C. | B and C |
| D. | A, B and CView Answer |
| Answer» E. | |
| 5. |
Which of these is incorrect for a common gate amplifier? |
| A. | It is a current buffer |
| B. | It has ∞ output resistance |
| C. | Its input resistance is high |
| D. | It is used as a high-frequency amplifier |
| Answer» D. It is used as a high-frequency amplifier | |
| 6. |
Consider the amplifier below.Find the input resistance and voltage gain of the circuit, given gm = 0.5mΩ-1 and rds = 0.2MΩ. |
| A. | RI = 27.27 kΩ, AV = 5 |
| B. | RI = 44 kΩ, AV = 1 |
| C. | RI = 27.27kΩ, AV = 1 |
| D. | RI = 60kΩ, AV = 100 |
| Answer» D. RI = 60kΩ, AV = 100 | |
| 7. |
For an RC coupled common source JFET amplifier without bypass capacitor, find the voltage gain if gm = 1mΩ-1, source resistance is 2kΩ, drain resistance is 15kΩ and load is 10kΩ. |
| A. | -2 |
| B. | -2.5 |
| C. | 5 |
| D. | 2 |
| Answer» B. -2.5 | |
| 8. |
Consider the circuit shown below.Find the net output resistance given that gm = 1mΩ-1 and rds = 0.1 MΩ. |
| A. | 10 kΩ |
| B. | 9.09 kΩ |
| C. | 100 kΩ |
| D. | 110 kΩ |
| Answer» C. 100 kΩ | |
| 9. |
Choose the incorrect statement for JFET(s). |
| A. | Maximum transconductance occurs at VGS=0 |
| B. | Transconductance decreases linearly with VGS |
| C. | Transconductance increases linearly with IDS |
| D. | Transconductance does not depend on VDS |
| Answer» D. Transconductance does not depend on VDS | |
| 10. |
Find the transconductance when applied gate to source voltage is -2V. |
| A. | 10 Ω-1 |
| B. | 10mΩ-1 |
| C. | 40mΩ-1 |
| D. | 20mΩ-1 |
| Answer» C. 40mΩ-1 | |
| 11. |
What are the small signal FET parameters? |
| A. | gm and rds |
| B. | gm and Vgs |
| C. | Vds and rds |
| D. | gm |
| Answer» B. gm and Vgs | |