MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
Find the current through gate if the FET was given with gate to source voltage =10V and drain to source voltage =20V, the pinch off voltage was -2V and ID=2mA. |
| A. | 10mA |
| B. | 20mA |
| C. | 0mA |
| D. | 2mA |
| Answer» D. 2mA | |
| 2. |
For a FET having IDSS=2mA Vgs=2V and Vp=-1V, What is the value of source current? |
| A. | 9mA |
| B. | 18mA |
| C. | 3mA |
| D. | 1mA |
| Answer» C. 3mA | |
| 3. |
For a n-channel FET, what is the condition of Vgs for which the current becomes zero? |
| A. | 0 |
| B. | 100V |
| C. | Vp |
| D. | Infinite |
| Answer» D. Infinite | |
| 4. |
For what value of Vgs, the drain current will be 1/4th of its maximum current? |
| A. | 0 |
| B. | 1 |
| C. | Vp |
| D. | Vp/2 |
| Answer» E. | |
| 5. |
If a FET has a pinch off voltage =-1V and ID=1mA, If Vgs=0V, What is the value of IDSS? |
| A. | 1A |
| B. | 1mA |
| C. | 0A |
| D. | 100mA |
| Answer» C. 0A | |
| 6. |
A p-channel Ge JFET has max-half channel width 5µm and channel conductivity of 2/Ωcm, if Er = 2000cm2/Vsec, What is the value of pinch off voltage? |
| A. | 8.21V |
| B. | 82.1V |
| C. | 88.21V |
| D. | 5.2V |
| Answer» D. 5.2V | |
| 7. |
FIND_THE_CURRENT_THROUGH_GATE_IF_THE_FET_WAS_GIVEN_WITH_GATE_TO_SOURCE_VOLTAGE_=10V_AND_DRAIN_TO_SOURCE_VOLTAGE_=20V,_THE_PINCH_OFF_VOLTAGE_WAS_-2V_AND_ID=2MA.?$ |
| A. | 10mA |
| B. | 20mA |
| C. | 0mA |
| D. | 2mA |
| Answer» D. 2mA | |
| 8. |
FOR_A_FET_HAVING_IDSS=2MA_VGS=2V_AND_VP=-1V,_WHAT_IS_THE_VALUE_OF_SOURCE_CURRENT??$ |
| A. | 9mA |
| B. | 18mA |
| C. | 3mA |
| D. | 1mA |
| Answer» C. 3mA | |
| 9. |
For a n-channel FET, what is the condition of Vgs for which the current becomes zero? |
| A. | 0 |
| B. | 100V |
| C. | V<sub>p</sub> |
| D. | Infinite |
| Answer» D. Infinite | |
| 10. |
For what value of Vgs, the drain current will be 1/4th of its maximum current? |
| A. | 0 |
| B. | 1 |
| C. | V<sub>p</sub> |
| D. | V<sub>p</sub>/2 |
| Answer» E. | |
| 11. |
If a FET has a pinch off voltage =-1V and ID=1mA, If Vgs=0V, What is the value of IDSS? |
| A. | 1A |
| B. | 1mA |
| C. | 0A |
| D. | 100mA |
| Answer» C. 0A | |
| 12. |
What is the relation between the drain current and source current once the voltage crosses pinch off? |
| A. | I<sub>D</sub> = I<sub>S</sub> |
| B. | I<sub>D</sub> = I<sub>S</sub> + 1.5 |
| C. | I<sub>D</sub> = 1/I<sub>S</sub> |
| D. | I<sub>S</sub> – 2I<sub>D</sub> = 0 |
| Answer» B. I<sub>D</sub> = I<sub>S</sub> + 1.5 | |
| 13. |
How does a FET behave when the v-I characteristics are to the left of pinch off for an n channel FET? |
| A. | Voltage controlled resistor |
| B. | Amplifier |
| C. | Switch |
| D. | Diode |
| Answer» B. Amplifier | |
| 14. |
What will happen if gate voltage applied is positive to pinch off voltage? |
| A. | Device burns |
| B. | More current flows |
| C. | Nothing happens |
| D. | Current remains the same |
| Answer» B. More current flows | |
| 15. |
A p-channel Ge JFET has max-half channel width 5µm and channel conductivity of 2/Ωcm, if Er = 2000cm2/Vsec, What is the value of pinch off voltage?$ |
| A. | 8.21V |
| B. | 82.1V |
| C. | 88.21V |
| D. | 5.2V |
| Answer» D. 5.2V | |
| 16. |
What is pinch off voltage? |
| A. | The minimum voltage required to turn on the FET |
| B. | The maximum voltage a FET can withstand |
| C. | Current amplification factor/voltage gain |
| D. | The value of voltage at which the current gets pinched to zero |
| Answer» E. | |