MCQOPTIONS
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MCQOPTIONS
This section includes 1475 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Which of the following configurations can a transistor set up? |
| A. | Common-base |
| B. | Common-emitter |
| C. | Common-collector |
| D. | All of the above |
| Answer» E. | |
| 552. |
What does a reading of a large or small resistance in forward- and reverse-biased conditions indicate when checking a transistor using an ohmmeter? |
| A. | Faulty device |
| B. | Good device |
| C. | Bad ohmmeter |
| D. | None of the above |
| Answer» B. Good device | |
| 553. |
What is (are) the component(s) of electrical characteristics on the specification sheets? |
| A. | On |
| B. | Off |
| C. | Small-signal characteristics |
| D. | All of the above |
| Answer» E. | |
| 554. |
In a series linear regulator, the control element is a(n) ________ in series with the load. |
| A. | inductor |
| B. | capacitor |
| C. | transistor |
| Answer» D. | |
| 555. |
This circuit is an example of the ac equivalent of an RC filter. |
| A. | True |
| B. | False |
| Answer» C. | |
| 556. |
In which region are both the collector-base and base-emitter junctions forward-biased? |
| A. | Active |
| B. | Cutoff |
| C. | Saturation |
| D. | All of the above |
| Answer» D. All of the above | |
| 557. |
List the types of bipolar junction transistors. |
| A. | <i>ppn, npn</i> |
| B. | <i>pnp, npn </i> |
| C. | <i>npp, ppn</i> |
| D. | <i>nnp, pnp</i> |
| Answer» C. <i>npp, ppn</i> | |
| 558. |
Which of the following regions is (are) part of the output characteristics of a transistor? |
| A. | Active |
| B. | Cutoff |
| C. | Saturation |
| D. | All of the above |
| Answer» E. | |
| 559. |
Which of the following is (are) the terminal(s) of a transistor? |
| A. | Emitter |
| B. | Base |
| C. | Collector |
| D. | All of the above |
| Answer» E. | |
| 560. |
A transistor can be checked using a(n) ________. |
| A. | curve tracer |
| B. | digital meter |
| C. | ohmmeter |
| D. | Any of the above |
| Answer» E. | |
| 561. |
Phototransistors usually respond only to light in the red or infrared spectrum. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 562. |
Identify the symbol: |
| A. | triac |
| B. | PUT |
| C. | LASCR |
| D. | SCR |
| Answer» C. LASCR | |
| 563. |
Identify the triac from the given figures. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| E. | e |
| Answer» F. | |
| 564. |
One important application of a state-variable ________ filter with a summing amplifier is to minimize the 60 Hz "hum" in audio systems. |
| A. | low-pass |
| B. | high-pass |
| C. | band-pass |
| D. | band-stop |
| Answer» E. | |
| 565. |
Which filter exhibits the most rapid roll-off rate? |
| A. | Bessel |
| B. | Butterworth |
| C. | Chebyshev |
| D. | all of the above |
| Answer» D. all of the above | |
| 566. |
Which filter has a maximally flat response? |
| A. | Bessel |
| B. | Butterworth |
| C. | Chebyshev |
| D. | all of the above |
| Answer» C. Chebyshev | |
| 567. |
Refer to this figure. This is a ________ filter. |
| A. | low-pass |
| B. | high-pass |
| C. | band-pass |
| D. | band-stop |
| Answer» C. band-pass | |
| 568. |
Refer to the given figure. This circuit is known as a ________ filter, and the fc is ________. |
| A. | high-pass, 1.59 kHz |
| B. | band-pass, 15.9 kHz |
| C. | low-pass, 15.9 kHz |
| D. | high-pass, 15.9 kHz |
| Answer» E. | |
| 569. |
Identify the symbol for an SCS. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| E. | e |
| Answer» D. d | |
| 570. |
The ________ is like a diac with a gate terminal. |
| A. | triac |
| B. | SCR |
| C. | SCS |
| D. | none of the above |
| Answer» B. SCR | |
| 571. |
You have a need to use a device to trigger an SCR. A good one to use might be |
| A. | an SCS. |
| B. | a UJT. |
| C. | a 4-layer diode. |
| D. | a PUT. |
| Answer» C. a 4-layer diode. | |
| 572. |
The SCR can be triggered on by a pulse at the |
| A. | gate. |
| B. | anode. |
| C. | cathode. |
| D. | none of the above |
| Answer» B. anode. | |
| 573. |
The ________ can conduct current in either direction and is turned on when a breakover voltage is exceeded. |
| A. | SCR |
| B. | diac |
| C. | SCS |
| D. | triac |
| Answer» C. SCS | |
| 574. |
You need to design a relaxation oscillator circuit. The most likely device to use might be |
| A. | an SCR. |
| B. | a UJT. |
| C. | a triac. |
| D. | a 4-layer diode. |
| Answer» C. a triac. | |
| 575. |
Identify the diac symbol. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| E. | e |
| Answer» E. e | |
| 576. |
You have the schematic diagram of several types of circuits. Which of these circuits most likely uses a triac? |
| A. | an oscillator |
| B. | an ac motor control |
| C. | a programmable oscillator |
| D. | an amplifier |
| Answer» C. a programmable oscillator | |
| 577. |
This circuit is a ________ oscillator. |
| A. | phase-shift |
| B. | Wien bridge |
| C. | Colpitts |
| D. | Hartley |
| Answer» B. Wien bridge | |
| 578. |
Which of the following equipment can check the condition of a transistor? |
| A. | Current tracer |
| B. | Digital display meter (DDM) |
| C. | Ohmmeter (VOM) |
| D. | All of the above |
| Answer» E. | |
| 579. |
For what kind of amplifications can the active region of the common-emitter configuration be used? |
| A. | Voltage |
| B. | Current |
| C. | Power |
| D. | All of the above |
| Answer» E. | |
| 580. |
In the active region, while the collector-base junction is ________-biased, the base-emitter is ________-biased. |
| A. | forward, forward |
| B. | forward, reverse |
| C. | reverse, forward |
| D. | reverse, reverse |
| Answer» D. reverse, reverse | |
| 581. |
In saturation, both the base-collector and base-emitter junctions are forward-biased. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 582. |
DC is the ratio of IC to IE. |
| A. | True |
| B. | False |
| Answer» C. | |
| 583. |
The silicon-controlled switch (SCS) is similar in construction to the |
| A. | triac. |
| B. | diac. |
| C. | SCR. |
| D. | 4-layer diode. |
| Answer» D. 4-layer diode. | |
| 584. |
An RC network has values of R = 1.2 k and C = 0.22 F. Find fc. |
| A. | 3.79 kHz |
| B. | 1.89 kHz |
| C. | 603 Hz |
| D. | 60 Hz |
| Answer» D. 60 Hz | |
| 585. |
Halving the power corresponds to a ________ dB ________. |
| A. | 3, decrease |
| B. | 10, decrease |
| C. | 3, increase |
| D. | 10, increase |
| Answer» B. 10, decrease | |
| 586. |
Refer to this figure. If RL decreases in value, the output voltage will |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| Answer» C. remain the same. | |
| 587. |
Refer to this figure. The upper cutoff frequency of this amplifier is 22 kHz. The output at that frequency is 6.71 V p-p. What is the output voltage at 220 kHz? |
| A. | 9.49 V p-p |
| B. | 6.71 V p-p |
| C. | 0.671 V p-p |
| D. | 0.0671 V p-p |
| Answer» D. 0.0671 V p-p | |
| 588. |
Refer to this figure. The capacitor C1 affects |
| A. | high-frequency response. |
| B. | low-frequency response. |
| C. | midrange response. |
| D. | nothing. |
| Answer» C. midrange response. | |
| 589. |
For low-frequency response, all RC circuits in an amplifier may not have the same critical frequency. Which RC response will determine the critical frequency of the amplifier? |
| A. | the lowest frequency |
| B. | the center frequency |
| C. | the highest frequency |
| D. | the bypass frequency |
| Answer» D. the bypass frequency | |
| 590. |
A ten-times change in frequency is called a(n) |
| A. | octave. |
| B. | decade. |
| C. | decimal. |
| D. | none of the above |
| Answer» C. decimal. | |
| 591. |
The frequency response of an amplifier can be determined using the step response method, and measuring the output rise/fall times between |
| A. | 0% and 100% response. |
| B. | 10% and 90% response. |
| C. | 25% and 75% response. |
| D. | five time constant responses. |
| Answer» C. 25% and 75% response. | |
| 592. |
An amplifier has an input signal voltage of 0.054 mV. The output voltage is 12.5 V. The voltage gain in dB is |
| A. | 53.6 dB. |
| B. | 107.3 dB. |
| C. | 231 dB. |
| D. | 116 dB. |
| Answer» C. 231 dB. | |
| 593. |
Refer to this figure. The capacitor C3 affects |
| A. | high-frequency response. |
| B. | low-frequency response. |
| C. | midrange response. |
| D. | nothing. |
| Answer» C. midrange response. | |
| 594. |
Each RC circuit causes the gain to drop at a rate of ________ dB/decade. |
| A. | 20 |
| B. | 10 |
| C. | 6 |
| D. | none of the above |
| Answer» B. 10 | |
| 595. |
The phase shift through the input of an RC circuit approaches ________ as the frequency approaches zero. |
| A. | 0 |
| B. | 45 |
| C. | 180 |
| D. | 90 |
| Answer» E. | |
| 596. |
A certain amplifier has a bandwidth of 22.5 kHz with a lower cutoff frequency of 600 Hz. What is the value of fcu? |
| A. | 600 Hz |
| B. | 22.5 kHz |
| C. | 23.1 kHz |
| D. | 21.9 kHz |
| Answer» D. 21.9 kHz | |
| 597. |
Internal transistor junction capacitances affect the high-frequency response of amplifiers by |
| A. | reducing the amplifier's gain. |
| B. | introducing phase shift as the signal frequency increases. |
| C. | having no effect. |
| D. | reducing the amplifier's gain and introducing phase shift as the signal frequency increases. |
| Answer» E. | |
| 598. |
For a JFET, the value of VDS at which ID becomes essentially constant is the |
| A. | pinch-off voltage. |
| B. | cutoff voltage. |
| C. | breakdown voltage. |
| D. | ohmic voltage. |
| Answer» B. cutoff voltage. | |
| 599. |
The ________ has a physical channel between the drain and source. |
| A. | D-MOSFET |
| B. | E-MOSFET |
| C. | V-MOSFET |
| Answer» B. E-MOSFET | |
| 600. |
Refer to figure given below. Calculate the value of VDS. |
| A. | 0 V |
| B. | 2 V |
| C. | 4 V |
| D. | 2 V |
| Answer» C. 4 V | |