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. |
A feedback amplifier has a ________ upper 3-dB frequency and a ________ lower 3-dB frequency compared to an amplifier without feedback. |
| A. | smaller, higher |
| B. | higher, smaller |
| C. | smaller, smaller |
| D. | higher, higher |
| Answer» C. smaller, smaller | |
| 2. |
A pass transistor may be used in a series regulator, as the current-carrying device. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
For an IC regulator, the input voltage must be at least 2 V above the regulated output voltage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
A switching regulator can be configured as a step-up or a step-down voltage regulator. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
IC voltage regulators are sometimes called three-terminal regulators. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Under no-load, a shunt regulator has minimum current through the control element. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The ________ is (are) an adjustable voltage regulator. |
| A. | series 7800 ICs |
| B. | series 7900 ICs |
| C. | LM317 |
| D. | None of the above |
| Answer» D. None of the above | |
| 8. |
The ________ the ac variation with respect to the dc level, the ________ the filter circuit's operation. |
| A. | smaller, better |
| B. | larger, better |
| C. | smaller, worse |
| D. | None of the above |
| Answer» B. larger, better | |
| 9. |
IC units provide regulation of ________. |
| A. | a fixed positive voltage |
| B. | a fixed negative voltage |
| C. | an adjustably set voltage |
| D. | All of the above |
| Answer» E. | |
| 10. |
The ________ values of capacitor filter provide ________ ripple and ________ average voltage. |
| A. | larger, more, higher |
| B. | smaller, less, lower |
| C. | smaller, more, higher |
| D. | larger, less, higher |
| Answer» E. | |
| 11. |
Collector-feedback bias provides very poor stability with negative feedback from collector to base. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
A transistor is operating in a linear fashion at saturation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Base biasing is common in relay driver circuits. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
The formula DC = IB/IC is correct. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
The base bias circuit arrangement provides poor stability because its Q-point varies widely with DC. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
In class B operation, the current drawn from a single power supply has the form of ________ rectified signal. |
| A. | a full-wave |
| B. | a half-wave |
| C. | both a full-wave and a half-wave |
| D. | None of the above |
| Answer» B. a half-wave | |
| 17. |
Improvement in production techniques of power transistors have ________. |
| A. | produced higher power ratings in small-sized packaging cases |
| B. | increased the maximum transistor breakdown voltage |
| C. | provided faster-switching power transistors |
| D. | All of the above |
| Answer» E. | |
| 18. |
The amount of power dissipated by the transistor is the ________ of that drawn from the dc supply (set by the bias point) and the amount delivered to the ac load. |
| A. | summation |
| B. | product |
| C. | difference |
| D. | average |
| Answer» D. average | |
| 19. |
The complementary Darlington-connected transistor for a class B amplifier provides ________ output current and ________ output resistance. |
| A. | higher, higher |
| B. | higher, lower |
| C. | lower, lower |
| D. | lower, higher |
| Answer» C. lower, lower | |
| 20. |
The greater the power handled by the power transistor, ________ the case temperature. |
| A. | the higher |
| B. | the lower |
| C. | there is no change in |
| D. | None of the above |
| Answer» B. the lower | |
| 21. |
In a class A transformer-coupled amplifier, the ________ the value of VCEmax and the ________ the value of VCEmin, the ________ the efficiency to (from) the theoretical limit of 50%. |
| A. | larger, smaller, farther |
| B. | larger, smaller, closer |
| C. | smaller, larger, closer |
| D. | None of the above |
| Answer» C. smaller, larger, closer | |
| 22. |
Class D operation can achieve power efficiency of over ________. |
| A. | 90% |
| B. | 78.5% |
| C. | 50% |
| D. | 25% |
| Answer» B. 78.5% | |
| 23. |
In Fourier technique, any periodic distorted waveform can be represented by ________ the fundamental and all harmonic components. |
| A. | multiplying |
| B. | subtracting |
| C. | dividing |
| D. | adding |
| Answer» E. | |
| 24. |
The beta of a power transistor is generally ________. |
| A. | more than 200 |
| B. | 100 to 200 |
| C. | less than 100 |
| D. | 0 |
| Answer» D. 0 | |
| 25. |
The fundamental component is typically ________ any harmonic component. |
| A. | larger than |
| B. | the same as |
| C. | smaller than |
| D. | None of the above |
| Answer» B. the same as | |
| 26. |
The class C amplifier is biased below cutoff. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 27. |
Class B amplifiers are usually zero-biased. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 28. |
Class B amplifiers are usually operated in push-pull to obtain an output that is a near replica of the input signal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 29. |
In a large-signal amplifier, the ac signal only needs to move over a small percentage of the total ac load line. |
| A. | True |
| B. | False |
| Answer» C. | |
| 30. |
The controlled variable on the output side of an FET transistor is a ________ level. |
| A. | current |
| B. | voltage |
| C. | resistor |
| D. | None of the above |
| Answer» B. voltage | |
| 31. |
The level of VDS is typically between ________ % and ________ % of VDD. |
| A. | 0, 100 |
| B. | 10, 90 |
| C. | 25, 75 |
| D. | None of the above |
| Answer» D. None of the above | |
| 32. |
The coupling capacitors are ________ for the dc analysis and ________ for the ac analysis. |
| A. | open-circuit, low impedance |
| B. | short-circuit, low impedance |
| C. | open-circuit, high impedance |
| D. | None of the above |
| Answer» B. short-circuit, low impedance | |
| 33. |
________ levels of RS result in ________ quiescent values of ID and ________ negative values of VGS. |
| A. | Increased, lower, less |
| B. | Increased, higher, less |
| C. | Increased, higher, more |
| D. | Increased, less, lower |
| Answer» B. Increased, higher, less | |
| 34. |
The dc load line is drawn using the equation obtained by applying Kirchhoff's voltage law (KVL) at ________ side loop(s) of the circuit. |
| A. | the output |
| B. | the input |
| C. | both the input and output |
| D. | None of the above |
| Answer» C. both the input and output | |
| 35. |
In a universal JFET bias curve, the vertical scale labeled M is used for finding the solution to the ________ configuration. |
| A. | fixed-bias |
| B. | self-bias |
| C. | voltage-divider |
| D. | None of the above |
| Answer» D. None of the above | |
| 36. |
________ must be considered in the total design process. |
| A. | Dc conditions |
| B. | Level of amplification |
| C. | Signal strength |
| D. | All of the above |
| Answer» E. | |
| 37. |
The input controlling variable for an FET transistor is a ________ level. |
| A. | resistor |
| B. | current |
| C. | voltage |
| D. | All of the above |
| Answer» D. All of the above | |
| 38. |
For the field-effect transistor, the relationship between the input and the output quantities is ________. |
| A. | linear |
| B. | nonlinear |
| C. | 3rd degree |
| D. | None of the above |
| Answer» C. 3rd degree | |
| 39. |
In p-channel FETs, the level of VGS is ________ while the level of VDS is ________. |
| A. | negative, negative |
| B. | positive, positive |
| C. | negative, positive |
| D. | positive, negative |
| Answer» E. | |
| 40. |
In a universal JFET bias curve, the vertical scale labeled m is used to find the solution to the ________ configuration. |
| A. | fixed-bias |
| B. | self-bias |
| C. | voltage-divider |
| D. | None of the above |
| Answer» B. self-bias | |
| 41. |
When plotting the transfer characteristics, choosing VGS = 0.5VP will result in a drain current level of ________ IDSS. |
| A. | 0 |
| B. | 0.25 |
| C. | 0.5 |
| D. | 1 |
| Answer» C. 0.5 | |
| 42. |
For a common-base configuration, the input impedance is relatively ________ and the output impedance quite ________. |
| A. | high, small |
| B. | small, high |
| C. | small, small |
| D. | high, high |
| Answer» C. small, small | |
| 43. |
For transistor amplifiers, the no-load voltage gain is ________ the loaded voltage gain. |
| A. | smaller than |
| B. | greater than |
| C. | the same as |
| D. | None of the above |
| Answer» C. the same as | |
| 44. |
The output voltage and the input voltage are ________ for the common-base configuration. |
| A. | 45 out of phase |
| B. | 90 out of phase |
| C. | 180 out of phase |
| D. | in phase |
| Answer» E. | |
| 45. |
In an emitter-follower, the output voltage is ________ with the input voltage. |
| A. | 45 out of phase |
| B. | 90 out of phase |
| C. | 180 out of phase |
| D. | in phase |
| Answer» E. | |
| 46. |
________ can be applied to determine the response of the ac equivalent circuit. |
| A. | Mesh analysis |
| B. | Node analysis |
| C. | Thevenin's theorem |
| D. | All of the above |
| Answer» E. | |
| 47. |
A Darlington pair provides a very low input impedance. |
| A. | True |
| B. | False |
| Answer» C. | |
| 48. |
The output resistance of the common-emitter amplifier is approximately equal to the collector resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 49. |
A coupling capacitor couples dc to an amplifier. |
| A. | True |
| B. | False |
| Answer» C. | |
| 50. |
The common-base amplifier has a good voltage gain, low input impedance, and high current gain. |
| A. | True |
| B. | False |
| Answer» C. | |