MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In an analog MOSFET switch, the input is applied to the gate and the output is taken from the source. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The common-drain configuration has extremely high input resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Digital MOSFET switches are used in the sample-and-hold circuit of an analog-to-digital converter. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The common-source configuration has extremely high input resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The common-drain amplifier is also called a source-follower. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
A load resistance connected to the output of an amplifier reduces the voltage gain. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
In a class D amplifier, the low-pass filter comes directly after the pulse-width modulator. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
In the hybrid or Giacoletto model, which one of the following does rb include? |
| A. | Base spreading resistance |
| B. | Base contact |
| C. | Base bulk |
| D. | All of the above |
| Answer» E. | |
| 9. |
If the parasitic capacitors were the only elements to determine the high cutoff frequency, the ________ frequency would be the determining factor. |
| A. | lowest |
| B. | highest |
| C. | lowest or highest |
| D. | None of the above |
| Answer» B. highest | |
| 10. |
For any inverting amplifier, the impedance capacitance will be ________ by a Miller effect capacitance sensitive to the gain of the amplifier and the interelectrode capacitance. |
| A. | unaffected |
| B. | increased |
| C. | decreased |
| D. | None of the above |
| Answer» D. None of the above | |
| 11. |
This circuit is an example of a ________. |
| A. | single-ended input |
| B. | double-ended (differential) input |
| C. | double-ended output |
| D. | common-mode operation |
| Answer» B. double-ended (differential) input | |
| 12. |
This is an example of the output swing for a class ________ amplifier. |
| A. | A |
| B. | B |
| C. | AB |
| D. | C |
| E. | D |
| Answer» C. AB | |
| 13. |
Refer to this figure. The dc voltage on the collector, VC, is |
| A. | 5.4 V. |
| B. | 6.6 V. |
| C. | 12 V. |
| D. | 0 V. |
| Answer» B. 6.6 V. | |
| 14. |
What is the first phase of the dual-slope method of conversion? |
| A. | Connecting the analog voltage to the integrator for a fixed time |
| B. | Setting the counter to zero |
| C. | Connecting the integrator to a reference voltage |
| D. | All of the above |
| Answer» B. Setting the counter to zero | |
| 15. |
The frequency distortion arising because of varying amplifier gain with frequency is considerably reduced in a negative-voltage feedback amplifier circuit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
This is an equivalent circuit for the ________ diode. |
| A. | Schottky |
| B. | varicap |
| C. | tunnel |
| Answer» C. tunnel | |
| 17. |
Refer to this figure. Which symbol is correct for a zener diode? |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| E. | e |
| Answer» C. c | |
| 18. |
In a class B push-pull amplifier, crossover distortion occurs when both transistors are off and the input signal voltage must exceed VBE before a transistor conducts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
An E-MOSFET can be operated with either positive or negative values of VGS. |
| A. | True |
| B. | False |
| Answer» C. | |
| 20. |
The lower critical frequency is also known as the |
| A. | break frequency. |
| B. | cutoff frequency. |
| C. | corner frequency. |
| D. | all of the above |
| Answer» E. | |
| 21. |
Refer to this figure. Increasing the values of the filter section resistors in this circuit will cause the fc to |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| D. | increase and then decrease. |
| Answer» C. remain the same. | |
| 22. |
You can select the values for the emitter and collector resistors from the information that is provided for this circuit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 23. |
For an "on" transistor, the voltage VBE should be in the neighborhood of 0.7 V. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 24. |
In a class D amplifier, the output transistors are operated in a nonlinear mode. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
Generally, higher voltage gains can be achieved with bipolar amplifiers than with FET amplifiers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 26. |
Bypassing a source resistor reduces the voltage gain. |
| A. | True |
| B. | False |
| Answer» C. | |
| 27. |
The gate-to-source voltage VGS of a(n) ________ must be larger than the threshold VGS(Th) for the transistor to conduct. |
| A. | JFET |
| B. | D-type MOSFET |
| C. | E-type MOSFET |
| D. | None of the above |
| Answer» D. None of the above | |
| 28. |
For the typical transistor amplifier in the active region, VCE is usually about ________ % to ________ % of VCC. |
| A. | 0, 100 |
| B. | 25, 75 |
| C. | 45, 55 |
| D. | None of the above |
| Answer» C. 45, 55 | |
| 29. |
For the dc analysis the network can be isolated from the indicated ac levels by replacing the capacitor with ________. |
| A. | an open circuit equivalent |
| B. | a short circuit equivalent |
| C. | a source voltage |
| D. | None of the above |
| Answer» B. a short circuit equivalent | |
| 30. |
There is no phase inversion between the gate and the drain voltages. |
| A. | True |
| B. | False |
| Answer» C. | |
| 31. |
The isolation between input and output circuits in the ac equivalent circuit is lost in a ________ configuration. |
| A. | common-gate |
| B. | common-source |
| C. | common-drain |
| D. | None of the above |
| Answer» B. common-source | |
| 32. |
The ________ does not support Shockley's equation. |
| A. | JFET |
| B. | D-type MOSFET |
| C. | E-type MOSFET |
| D. | None of the above |
| Answer» D. None of the above | |
| 33. |
Forward bias is the condition that allows current through a pn junction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 34. |
An intrinsic crystal is one that contains a small amount of impurities. |
| A. | True |
| B. | False |
| Answer» C. | |
| 35. |
N-type semiconductor material has very few free electrons. |
| A. | True |
| B. | False |
| Answer» C. | |
| 36. |
The silicon material used in semiconductors is extremely pure with no additives. |
| A. | True |
| B. | False |
| Answer» C. | |
| 37. |
The frequency in a VCO can be varied with a DC voltage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 38. |
Oscillators operate on negative feedback. |
| A. | True |
| B. | False |
| Answer» C. | |
| 39. |
The start-up gain of an oscillator must be greater than 1. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 40. |
In the astable mode, a 555 timer is connected as a free-running relaxation oscillator. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 41. |
The dc voltage level of a silicon diode is ________ its ideal model. |
| A. | smaller than |
| B. | larger than |
| C. | the same as |
| D. | None of the above |
| Answer» C. the same as | |
| 42. |
As the load resistor increases, the slope of the dc load line and the levels of diode current ________. |
| A. | increase |
| B. | decrease |
| C. | remain unchanged |
| D. | are unpredictable |
| Answer» C. remain unchanged | |
| 43. |
Once the Zener diode is in the "on" state, VZ is always ________ VL. |
| A. | larger than |
| B. | smaller than |
| C. | the same as |
| D. | None of the above |
| Answer» D. None of the above | |
| 44. |
The absence of the Si or Ge and VD label on a diode denotes ________ notation. |
| A. | approximate model |
| B. | ideal model |
| C. | exact model |
| D. | None of the above |
| Answer» C. exact model | |
| 45. |
The x-intercept of the load line with the characteristic curve is determined by the ________. |
| A. | load resistor |
| B. | diode |
| C. | source voltage and the load resistor |
| D. | source voltage |
| Answer» E. | |
| 46. |
A germanium diode is approximated by ________ equivalent for voltages less than 0.3 V. |
| A. | a short circuit |
| B. | a series circuit |
| C. | a parallel circuit |
| D. | an open circuit |
| Answer» E. | |
| 47. |
The output voltage of a center-tapped full-wave rectifier equals the secondary output voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 48. |
As VGS becomes ________ negative, the slope of each curve in the characteristics becomes ________ horizontal corresponding with an increasing resistance level. |
| A. | less, more |
| B. | more, less |
| C. | more, more |
| D. | None of the above |
| Answer» D. None of the above | |
| 49. |
In an n-channel enhancement-type MOSFET with a fixed value of VT, the ________ the level of VGS, the ________ the saturation level for VDS. |
| A. | higher, more |
| B. | higher, less |
| C. | lower, lower |
| D. | None of the above |
| Answer» B. higher, less | |
| 50. |
The FET resistance in the ohmic region is ________ at VP and ________ at the origin. |
| A. | smallest, largest |
| B. | largest, smallest |
| C. | larger, smaller |
| D. | smaller, larger |
| Answer» C. larger, smaller | |