MCQOPTIONS
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MCQOPTIONS
This section includes 20 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. |
The range of β is _________ |
| A. | 20 to 500 |
| B. | 50 to 300 |
| C. | 30 to 400 |
| D. | 10 to 20 |
| Answer» B. 50 to 300 | |
| 2. |
When the signal is applied, the ratio of change of collector current to the ratio of change of base current is called_________ |
| A. | dc current gain |
| B. | base current amplification factor |
| C. | emitter current amplification factor |
| D. | ac current gain |
| Answer» E. | |
| 3. |
In ICEO, wt does the subscript ‘CEO’ mean? |
| A. | collector to base emitter open |
| B. | emitter to base collector open |
| C. | collector to emitter base open |
| D. | emitter to collector base open |
| Answer» D. emitter to collector base open | |
| 4. |
The relation between α and β is_________ |
| A. | β = α/ (1-α) |
| B. | α = β/(1+β) |
| C. | β = α/ (1+α) |
| D. | α = β/(1- β) |
| Answer» C. β = α/ (1+α) | |
| 5. |
The collector supply voltage for a CE configured transistor is 10V. The resistance RL=800Ω. The voltage drop across RL is 0.8V. Find the value of collector emitter voltage. |
| A. | 3.7V |
| B. | 9.2V |
| C. | 6.5V |
| D. | 9.8V |
| Answer» C. 6.5V | |
| 6. |
A transistor is connected in CE configuration. Collector supply voltage Vcc=10V, RL=800Ω, voltage drop across RL=0.8V, α=0.96. What is base current? |
| A. | 41.97µA |
| B. | 56.78µA |
| C. | 67.67µA |
| D. | 78.54µA |
| Answer» B. 56.78µA | |
| 7. |
In CE configuration, if the voltage drop across 5kΩ resistor connected in the collector circuit is 5V. Find the value of IB when β=50. |
| A. | 0.01mA |
| B. | 0.25mA |
| C. | 0.03mA |
| D. | 0.02mA |
| Answer» E. | |
| 8. |
A germanium transistor with α=0.98 gives a reverse saturation current ICBO=10µA in a CB configuration. When it is used in CE configuration with a base current of 0.22µA, calculate the collector current. |
| A. | 0.9867mA |
| B. | 0.7654mA |
| C. | 0.51078mA |
| D. | 0.23456mA |
| Answer» D. 0.23456mA | |
| 9. |
In an NPN silicon transistor, α=0.995, IE=10mA and leakage current ICBO=0.5µA. Determine ICEO. |
| A. | 10µA |
| B. | 100µA |
| C. | 90µA |
| D. | 500µA |
| Answer» C. 90µA | |
| 10. |
The base current amplification factor β is given by_________ |
| A. | IC/IB |
| B. | IB/IC |
| C. | IE/IB |
| D. | IB/IE |
| Answer» B. IB/IC | |
| 11. |
THE_RANGE_OF_‚ÂÀ√≠‚ÄÖ√¢¬ß_IS__________?$# |
| A. | 20 to 500 |
| B. | 50 to 300 |
| C. | 30 to 400 |
| D. | 10 to 20 |
| Answer» B. 50 to 300 | |
| 12. |
WHEN_THE_SIGNAL_IS_APPLIED,_THE_RATIO_OF_CHANGE_OF_COLLECTOR_CURRENT_TO_THE_RATIO_OF_CHANGE_OF_BASE_CURRENT_IS_CALLED_________?$ |
| A. | dc current gain |
| B. | base current amplification factor |
| C. | emitter current amplification factor |
| D. | ac current gain |
| Answer» E. | |
| 13. |
In ICEO, wt does the subscript ‘CEO’ mean?# |
| A. | collector to base emitter open |
| B. | emitter to base collector open |
| C. | collector to emitter base open |
| D. | emitter to collector base open |
| Answer» D. emitter to collector base open | |
| 14. |
The relation between α and β is_________$ |
| A. | β = α/ (1-α) |
| B. | α = β/(1+β) |
| C. | β = α/ (1+α) |
| D. | α = β/(1- β) |
| Answer» C. ‚âà√≠‚Äö√¢¬ß = ‚âà√≠¬¨¬±/ (1+‚âà√≠¬¨¬±) | |
| 15. |
The collector supply voltage for a CE configured transistor is 10V. The resistance RL=800Ω. The voltage drop across RL is 0.8V. Find the value of collector emitter voltage.$ |
| A. | 3.7V |
| B. | 9.2V |
| C. | 6.5V |
| D. | 9.8V |
| Answer» C. 6.5V | |
| 16. |
A transistor is connected in CE configuration. Collector supply voltage Vcc=10V, RL=800Ω, voltage drop across RL=0.8V, α=0.96. What is base current?$ |
| A. | 41.97µA |
| B. | 56.78µA |
| C. | 67.67µA |
| D. | 78.54µA |
| Answer» B. 56.78¬¨¬®¬¨¬µA | |
| 17. |
In CE configuration, if the voltage drop across 5kΩ resistor connected in the collector circuit is 5V. Find the value of IB when β=50.$ |
| A. | 0.01mA |
| B. | 0.25mA |
| C. | 0.03mA |
| D. | 0.02mA |
| Answer» E. | |
| 18. |
A germanium transistor with α=0.98 gives a reverse saturation current ICBO=10µA in a CB configuration. When it is used in CE configuration with a base current of 0.22µA, calculate the collector current.$ |
| A. | 0.9867mA |
| B. | 0.7654mA |
| C. | 0.51078mA |
| D. | 0.23456mA |
| Answer» D. 0.23456mA | |
| 19. |
In an NPN silicon transistor, α=0.995, IE=10mA and leakage current ICBO=0.5µA. Determine ICEO.$ |
| A. | 10µA |
| B. | 100µA |
| C. | 90µA |
| D. | 500µA |
| Answer» C. 90¬¨¬®¬¨¬µA | |
| 20. |
The base current amplification factor β is given by_________ |
| A. | I<sub>C</sub>/I<sub>B</sub> |
| B. | I<sub>B</sub>/I<sub>C</sub> |
| C. | I<sub>E</sub>/I<sub>B</sub> |
| D. | I<sub>B</sub>/I<sub>E</sub> |
| Answer» B. I<sub>B</sub>/I<sub>C</sub> | |