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.
| 601. |
Refer to figure shown below. Determine the value of VS. |
| A. | 20 V |
| B. | 8 V |
| C. | 6 V |
| D. | 2 V |
| Answer» D. 2 V | |
| 602. |
A two-times change in frequency is called a(n) |
| A. | binave. |
| B. | octave. |
| C. | decade. |
| D. | none of the above |
| Answer» C. decade. | |
| 603. |
In a multistage amplifier, the overall frequency response is determined by the |
| A. | frequency response of each stage depending on the relationships of the critical frequencies. |
| B. | frequency response of the first amplifier. |
| C. | frequency response of the last amplifier. |
| D. | lower critical frequency of the first amplifier and the upper critical frequency of the final amplifier. |
| Answer» B. frequency response of the first amplifier. | |
| 604. |
What term means that the midrange voltage gain is assigned a value of 1 (or 0 dB)? |
| A. | critical |
| B. | Miller |
| C. | normalized |
| D. | corner |
| Answer» D. corner | |
| 605. |
Refer to this figure. The capacitor Cbe affects |
| A. | high-frequency response. |
| B. | low-frequency response. |
| C. | midrange response. |
| D. | nothing. |
| Answer» B. low-frequency response. | |
| 606. |
An RC network has a roll-off of 20 dB per decade. What is the total attenuation between the output voltage in the midrange of the passband as compared to the output voltage at a frequency of 10 times fc? |
| A. | 3 dB |
| B. | 20 dB |
| C. | 23 dB |
| D. | 43 dB |
| Answer» C. 23 dB | |
| 607. |
It is often convenient in amplifiers to assign a certain value of gain as the ________ dB reference. |
| A. | 0 |
| B. | 1 |
| C. | 6 |
| D. | 10 |
| E. | 20 |
| Answer» B. 1 | |
| 608. |
What is the method that can be used to determine the values of fcl and fcu of an amplifier? |
| A. | five time constants |
| B. | step-response |
| C. | sinusoidal |
| Answer» C. sinusoidal | |
| 609. |
A self-biased n-channel JFET has a VD = 6 V. VGS = 3 V. Find the value of VDS. |
| A. | 3 V |
| B. | 6 V |
| C. | 3 V |
| D. | 6 V |
| Answer» D. 6 V | |
| 610. |
Calculate the fr of a lead-lag network if R1 = R2 = 6.8 k, and C1 = C2 = 0.05 F. |
| A. | 468 Hz |
| B. | 4.68 kHz |
| C. | 46.8 kHz |
| D. | 468 kHz |
| Answer» B. 4.68 kHz | |
| 611. |
Which of the following is (are) feedback? |
| A. | Voltage-series |
| B. | Voltage-shunt |
| C. | Current-series |
| D. | All of the above |
| Answer» E. | |
| 612. |
A certain oscillator has a tap on the inductor in the tank circuit. This oscillator is probably |
| A. | a Colpitts oscillator. |
| B. | a Clapp oscillator. |
| C. | a crystal oscillator. |
| D. | a Hartley oscillator. |
| Answer» E. | |
| 613. |
The twin-T oscillator produces a ________ response. |
| A. | low-pass |
| B. | high-pass |
| C. | band-pass |
| D. | band-stop |
| Answer» E. | |
| 614. |
The lead-lag circuit in the Wien-bridge oscillator has a resonant frequency at which the attenuation is |
| A. | 1/2. |
| B. | 1/4. |
| C. | 1/3. |
| D. | 1/5. |
| Answer» D. 1/5. | |
| 615. |
Refer to this figure. What is the duty cycle, if any? |
| A. | 16.3% |
| B. | 54.5% |
| C. | 86.9% |
| D. | none |
| Answer» C. 86.9% | |
| 616. |
The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 617. |
Calculate the resonant frequency of this oscillator. |
| A. | 1560.34 Hz |
| B. | 3120.70 Hz |
| C. | 4681.07 Hz |
| D. | 6241.37 Hz |
| Answer» B. 3120.70 Hz | |
| 618. |
What is the total phase shift requirement, around the feedback loop, for a phase-shift oscillator? |
| A. | 90 |
| B. | 180 |
| C. | 270 |
| D. | 360 |
| Answer» E. | |
| 619. |
One condition for positive feedback is that the phase shift around the feedback loop must be ________ . |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 45 |
| Answer» B. 90 | |
| 620. |
At what phase shift is the magnitude of A at its minimum in the Nyquist plot? |
| A. | 90 |
| B. | 180 |
| C. | 270 |
| D. | 0 |
| Answer» E. | |
| 621. |
Determine the voltage gain with feedback for a voltage-series feedback having A = 100, R1 = 15 k, Ro = 20 k, and a feedback of = 0.25. |
| A. | 3.85 |
| B. | 3.85 |
| C. | 9.09 |
| D. | 9.09 |
| Answer» C. 9.09 | |
| 622. |
Refer to the given figure. This circuit is known as |
| A. | a Clapp oscillator. |
| B. | an Armstrong oscillator. |
| C. | a Colpitts oscillator. |
| D. | a Hartley oscillator. |
| Answer» E. | |
| 623. |
Refer to the given figure. This circuit is known as |
| A. | a Clapp oscillator. |
| B. | an Armstrong oscillator. |
| C. | a Colpitts oscillator. |
| D. | a Hartley oscillator. |
| Answer» D. a Hartley oscillator. | |
| 624. |
Refer to this figure. Determine the frequency of oscillation, if any. |
| A. | 131 Hz |
| B. | 262 Hz |
| C. | 2.62 kHz |
| D. | none |
| Answer» B. 262 Hz | |
| 625. |
Refer to this figure. If C1 increases in value, the resonant frequency will |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| Answer» C. remain the same. | |
| 626. |
The amplifier is unstable if the Nyquist curve plotted encloses (encircles) the 1 point, and it is stable otherwise. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 627. |
Refer to this figure. This filter has a roll-off rate of |
| A. | 20 dB/decade. |
| B. | 40 dB/decade. |
| C. | 60 dB/decade. |
| D. | 80 dB/decade. |
| Answer» E. | |
| 628. |
Identify the frequency response curve for a band-reject filter. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» E. | |
| 629. |
Refer to the given figure. ID = 6 mA. Calculate the value of VDS. |
| A. | 13.2 V |
| B. | 10 V |
| C. | 6.8 V |
| D. | 0 V |
| Answer» D. 0 V | |
| 630. |
Refer to figure shown below. What is the value of IG? |
| A. | 6 mA |
| B. | 4 mA |
| C. | 2 mA |
| D. | 0 mA |
| Answer» E. | |
| 631. |
A JFET data sheet specifies VGS(off) = 6 V and IDSS = 8 mA. Find the value of ID when VGS = 3 V. |
| A. | 2 mA |
| B. | 4 mA |
| C. | 8 mA |
| D. | none of the above |
| Answer» B. 4 mA | |
| 632. |
A JFET data sheet specifies VGS(off) = 10 V and IDSS = 8 mA. Find the value of ID when VGS = 3 V. |
| A. | 2 mA |
| B. | 1.4 mA |
| C. | 4.8 mA |
| D. | 3.92 mA |
| Answer» E. | |
| 633. |
Identify the n-channel E-MOSFET. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» D. d | |
| 634. |
In a self-biased JFET circuit, if VD = VDD then ID = ________. |
| A. | 0 |
| B. | cannot be determined from information above |
| Answer» B. cannot be determined from information above | |
| 635. |
High input resistance for a JFET is due to |
| A. | a metal oxide layer. |
| B. | a large input resistor to the device. |
| C. | an intrinsic layer. |
| D. | the gate-source junction being reverse-biased. |
| Answer» E. | |
| 636. |
For a JFET, the change in drain current for a given change in gate-to-source voltage, with the drain-to-source voltage constant, is |
| A. | breakdown. |
| B. | reverse transconductance. |
| C. | forward transconductance. |
| D. | self-biasing. |
| Answer» D. self-biasing. | |
| 637. |
All MOSFETs are subject to damage from electrostatic discharge (ESD). |
| A. | true |
| B. | false |
| Answer» B. false | |
| 638. |
Identify the n-channel D-MOSFET. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» B. b | |
| 639. |
A dual-gated MOSFET is |
| A. | a depletion MOSFET. |
| B. | an enhancement MOSFET. |
| C. | a VMOSFET. |
| D. | either a depletion or an enhancement MOSFET. |
| Answer» E. | |
| 640. |
Refer to figure show below. Calculate the value of VD. |
| A. | 20 V |
| B. | 8 V |
| C. | 6 V |
| D. | 2 V |
| Answer» C. 6 V | |
| 641. |
A third-order filter will have a roll-off rate of |
| A. | 20 dB/decade. |
| B. | 40 dB/decade. |
| C. | 60 dB/decade. |
| D. | 30 dB/decade. |
| Answer» D. 30 dB/decade. | |
| 642. |
Thyristors are 4-layer semiconductor devices. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 643. |
The diac can conduct current in either direction and is turned on when a breakover voltage is exceeded. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 644. |
The triac is similar to an SCR, but it provides conduction for both halves of the ac wave. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 645. |
The JFET is always operated with the gate-source pn junction ________ -biased. |
| A. | forward |
| B. | reverse |
| Answer» C. | |
| 646. |
Identify the p-channel D-MOSFET. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» C. c | |
| 647. |
On the drain characteristic curve of a JFET for VGS = 0, the pinch-off voltage is |
| A. | below the ohmic area. |
| B. | between the ohmic area and the constant current area. |
| C. | between the constant current area and the breakdown region. |
| D. | above the breakdown region. |
| Answer» C. between the constant current area and the breakdown region. | |
| 648. |
Refer to the given figure. ID = 6 mA. Calculate the value of VDS. |
| A. | 6 V |
| B. | 6 V |
| C. | 12 V |
| D. | 3 V |
| Answer» C. 12 V | |
| 649. |
The triac can be turned on or off by a pulse at the gate. |
| A. | True |
| B. | False |
| Answer» C. | |
| 650. |
The SUS is also known as a Shockley diode. |
| A. | True |
| B. | False |
| Answer» B. False | |