MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following will possess a higher bandwidth, if two transistors are provided with unity gain frequency? |
| A. | Transistor with lower hfe |
| B. | Transistor with higher hfe |
| C. | Transistor with lower hre |
| D. | Transistor with higher hre |
| Answer» B. Transistor with higher hfe | |
| 2. |
The cut-off frequency (fβ) is basically the frequency at which the short circuit __________ |
| A. | CB gain of transistor drops by 3 dB from its value at low frequency |
| B. | CE gain of transistor drops by 3 dB from its value at low frequency |
| C. | CC gain of transistor drops by 3 dB from its value at low frequency |
| D. | CC gain of transistor drops by 3 dB from its value at high frequency |
| Answer» C. CC gain of transistor drops by 3 dB from its value at low frequency | |
| 3. |
The value of dBm in power measurement is predictable by assuming the reference, which is equal to ________ |
| A. | 1mW |
| B. | 10mW |
| C. | 1/10 mW |
| D. | 1/100 mW |
| Answer» B. 10mW | |
| 4. |
What should be the level of input resistance to allow the occurrence of source loading in common base amplifier configuration? |
| A. | Low |
| B. | High |
| C. | Moderate |
| D. | Stable |
| Answer» B. High | |
| 5. |
What are the consequences of diode compensation for the change in base-to-emitter voltage (VBE) due to temperature? |
| A. | Temperature compensation takes place by variation in forward voltage (VF) |
| B. | Collector current become sensitive to the change in base-to-emitter voltage (VBE) |
| C. | Depends |
| D. | Nothing happens |
| Answer» B. Collector current become sensitive to the change in base-to-emitter voltage (VBE) | |
| 6. |
If the ratio RB / RE tends to infinity, what should be the value of stability factor in voltage divider circuit? |
| A. | Unity |
| B. | Zero |
| C. | 1 – βdc |
| D. | 1 + βdc |
| Answer» E. | |
| 7. |
THE_VALUE_OF_DBM_IN_POWER_MEASUREMENT_IS_PREDICTABLE_BY_ASSUMING_THE_REFERENCE,_WHICH_IS_EQUAL_TO_________?$ |
| A. | 1mW |
| B. | 10mW |
| C. | 1/10 mW |
| D. | 1/100 mW |
| Answer» B. 10mW | |
| 8. |
Which among the following will possess a higher bandwidth, if two transistors are provided with unity gain frequency?$ |
| A. | Transistor with lower h<sub>fe</sub> |
| B. | Transistor with higher h<sub>fe</sub> |
| C. | Transistor with lower h<sub>re</sub> |
| D. | Transistor with higher h<sub>re</sub> |
| Answer» B. Transistor with higher h<sub>fe</sub> | |
| 9. |
The_cut-off_frequency_(fβ)_is_basically_the_frequency_at_which_the_short_circuit___________$# |
| A. | CB gain of transistor drops by 3 dB from its value at low frequency |
| B. | CE gain of transistor drops by 3 dB from its value at low frequency |
| C. | CC gain of transistor drops by 3 dB from its value at low frequency |
| D. | CC gain of transistor drops by 3 dB from its value at high frequency |
| Answer» C. CC gain of transistor drops by 3 dB from its value at low frequency | |
| 10. |
What is an angle of phase shift for each designed RC network in the Phase Shift Oscillator circuit? |
| A. | 60<sup>o</sup> |
| B. | 90<sup>o</sup> |
| C. | 180<sup>o</sup> |
| D. | 45<sup>o</sup> |
| Answer» B. 90<sup>o</sup> | |
| 11. |
Which of the following process plays a crucial role in devising the independency of operating point over the variations in temperature or transistor parameters? |
| A. | Bias stabilization |
| B. | Bias compensation |
| C. | Bias stabilization & compensation |
| D. | No process |
| Answer» B. Bias compensation | |
| 12. |
Which among the below specified conditions is applicable to prevent the occurrence of thermal runaway in voltage divider bias circuit? |
| A. | V<sub>CE</sub> < V<sub>CC</sub> / 2 |
| B. | V<sub>CE</sub> = V<sub>CC</sub> / 2 |
| C. | V<sub>CE</sub> > V<sub>CC</sub> / 2 |
| D. | None of the mentioned |
| Answer» B. V<sub>CE</sub> = V<sub>CC</sub> / 2 | |
| 13. |
Which among the following is an output provided by transresistance amplifier? |
| A. | Output current proportional to signal voltage |
| B. | Output voltage proportional to signal current |
| C. | Output voltage proportional to input voltage |
| D. | Output current proportional to signal current |
| Answer» C. Output voltage proportional to input voltage | |
| 14. |
Fidelity is nothing but an ability of amplifier to reproduce ________ |
| A. | Input signal without any distortion |
| B. | Output signal without any distortion |
| C. | Phase shift signal |
| D. | Amplitude shift signal |
| Answer» B. Output signal without any distortion | |
| 15. |
Generally, the resistance of thermistor decreases _______ |
| A. | Linearly with an increase in temperature |
| B. | Linearly with the decrease in temperature |
| C. | Exponentially with an increase in temperature |
| D. | Exponentially with the decrease in temperature |
| Answer» D. Exponentially with the decrease in temperature | |
| 16. |
What are the consequences of diode compensation for the change in base-to-emitter voltage (VBE) due to temperature? |
| A. | Temperature compensation takes place by variation in forward voltage (V<sub>F</sub>) |
| B. | Collector current become sensitive to the change in base-to-emitter voltage (V<sub>BE</sub>) |
| C. | Depends |
| D. | Nothing happens |
| Answer» B. Collector current become sensitive to the change in base-to-emitter voltage (V<sub>BE</sub>) | |
| 17. |
If the ratio RB / RE tends to infinity, what should be the value of stability factor in voltage divider circuit? |
| A. | Unity |
| B. | Zero |
| C. | 1 – β<sub>dc </sub> |
| D. | 1 + β<sub>dc</sub> |
| Answer» E. | |