MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Reverse collector saturation current ICBO is __________ |
| A. | Collector current when emitter current is zero |
| B. | Collector current when base current is zero |
| C. | Same as reverse saturation current |
| D. | Collector current when either emitter or base current is zero |
| Answer» B. Collector current when base current is zero | |
| 2. |
Which of the following statement about a common emitter transistor is true? |
| A. | Very high input resistance |
| B. | High output resistance |
| C. | Current gain is less than unity |
| D. | Voltage gain is very low |
| Answer» C. Current gain is less than unity | |
| 3. |
Which of the following is not true regarding the output capacitor in the transistor biasing circuit? |
| A. | To pass AC signal |
| B. | To stop DC signal |
| C. | To couple the amplifier to load or next amplifier |
| D. | There is no importance for an output capacitance |
| Answer» E. | |
| 4. |
Which of the following configuration is used for impedance matching? |
| A. | Common base configuration |
| B. | Common emitter configuration |
| C. | Common collector configuration |
| D. | All configurations are equally suited |
| Answer» D. All configurations are equally suited | |
| 5. |
What is the role of emitter resistance in the transistor amplifying circuit? |
| A. | To prevent thermal runaway |
| B. | To prevent increase in gain |
| C. | To lower the output impedance |
| D. | To increase gain |
| Answer» B. To prevent increase in gain | |
| 6. |
Which of the following configuration is used for audio signal amplification? |
| A. | Common base configuration |
| B. | Common emitter configuration |
| C. | Common collector configuration |
| D. | All configurations are equally suited |
| Answer» C. Common collector configuration | |
| 7. |
If an electronic system produces a 48mV output voltage when a 12mV signal is applied, calculate the decibel value of the systems output voltage gain. |
| A. | 12dB |
| B. | 6dB |
| C. | 20dB |
| D. | 4dB |
| Answer» B. 6dB | |
| 8. |
If the output power from an audio amplifier is measured at 100W when the signal frequency is 1kHz, and 1W when the signal frequency is 10kHz. Calculate the dB change in power. |
| A. | -10dB |
| B. | -20dB |
| C. | -30dB |
| D. | 15dB |
| Answer» C. -30dB | |
| 9. |
Voltage gain of 1,00,000 is equivalent to __________ |
| A. | 10dB |
| B. | 1000dB |
| C. | 100dB |
| D. | 50dB |
| Answer» D. 50dB | |
| 10. |
Which of the following is the best biasing method for transistor bias? |
| A. | emitter bias |
| B. | voltage divider bias |
| C. | fixed bias |
| D. | collector feedback bias |
| Answer» C. fixed bias | |