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.
| 801. |
How many op-amps are required to implement this equation? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 802. |
Calculate the output voltage if V1 = 33 mV and V2 = 2 mV. |
| A. | 0 V |
| B. | 6.6 V |
| C. | 0.4 V |
| D. | 2 V |
| Answer» D. 2 V | |
| 803. |
Calculate the output voltage if V1 = 3.3 V and V2 = 0.8 V. |
| A. | 0 V |
| B. | 6.6 V |
| C. | 4 V |
| D. | 2 V |
| Answer» C. 4 V | |
| 804. |
When a number of stages are connected in parallel, the overall gain is the product of the individual stage gains. |
| A. | True |
| B. | False |
| Answer» C. | |
| 805. |
Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5 k and C1 = 0.05 F. |
| A. | 1.273 kHz |
| B. | 12.73 kHz |
| C. | 127.3 kHz |
| D. | 127.30 Hz |
| Answer» B. 12.73 kHz | |
| 806. |
A filter that provides a constant output from dc up to a cutoff frequency and passes no signal above that frequency is called a ________ filter. |
| A. | low-pass |
| B. | high-pass |
| C. | bandpass |
| Answer» B. high-pass | |
| 807. |
Calculate the output voltage if V1 = 0 V and V2 = 0.2 V. |
| A. | 0 V |
| B. | 6.6 V |
| C. | 4 V |
| D. | 2 V |
| Answer» C. 4 V | |
| 808. |
Calculate the output voltage. |
| A. | 3.02 V |
| B. | 2.03 V |
| C. | 1.78 V |
| D. | 1.50 V |
| Answer» B. 2.03 V | |
| 809. |
Calculate the output of the second stage op-amp if V1 = 25 mV. |
| A. | 0.075 V |
| B. | 0.525 V |
| C. | 0.06 V |
| D. | 4.2 V |
| Answer» B. 0.525 V | |
| 810. |
A difference between a passive filter and an active filter is that a passive filter uses amplifier(s), but an active filter does not. |
| A. | True |
| B. | False |
| Answer» C. | |
| 811. |
Calculate the output voltage Vo if V1 = V2 = 300 mV. |
| A. | 0 V |
| B. | 6 V |
| C. | 6 V |
| D. | 8 V |
| Answer» D. 8 V | |
| 812. |
Calculate IL for this circuit. |
| A. | 3 mA |
| B. | 4 mA |
| C. | 5 mA |
| D. | 6 mA |
| Answer» D. 6 mA | |
| 813. |
Calculate the input voltage for this circuit if Vo = 11 V. |
| A. | 1.1 V |
| B. | 1.1 V |
| C. | 1 V |
| D. | 1 V |
| Answer» B. 1.1 V | |
| 814. |
Calculate the input voltage when Vo = 11 V. |
| A. | 1.1 V |
| B. | 1.1 V |
| C. | 1 V |
| D. | 1 V |
| Answer» E. | |
| 815. |
Calculate the output voltage if V1 = 300 mV and V2 = 700 mV. |
| A. | 0 V |
| B. | 12 V |
| C. | 12 V |
| D. | 4 V |
| Answer» E. | |
| 816. |
What does VCO stand for? |
| A. | Visually-Controlled Organization |
| B. | Voltage-Controlled Oscillator |
| C. | Voltage-Centered Oscilloscope |
| Answer» C. Voltage-Centered Oscilloscope | |
| 817. |
If a 1 MHz carrier is amplitude modulated with a 5 kHz audio signal, the upper-side frequency is ________ kHz. |
| A. | 1005 |
| B. | 1000 |
| C. | 995 |
| D. | none of the above |
| Answer» B. 1000 | |
| 818. |
In AM, the carrier is changed by a modulating signal. What parameter of the carrier is changed? |
| A. | amplitude |
| B. | frequency |
| C. | pulse width |
| D. | phase |
| Answer» B. frequency | |
| 819. |
For a four-quadrant linear multiplier, what is the output voltage, given input voltages of Vx = +2 V and Vy = 10 V? |
| A. | +2 V |
| B. | +1 V |
| C. | 2 V |
| D. | 1 V |
| Answer» D. 1 V | |
| 820. |
The output spectrum of a ________ modulator includes upper-side and lower-side frequencies and the carrier frequency. |
| A. | balanced |
| B. | standard amplitude |
| C. | none of the above |
| Answer» C. none of the above | |
| 821. |
How many terminals does a programmable unijunction transistor (PUT) have? |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 822. |
The ISO-LIT Q1 16-pin Litronix opto-isolator DIP contains ________ opto-isolators. |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 6 |
| Answer» B. 8 | |
| 823. |
How many terminals does a Shockley diode have? |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» E. | |
| 824. |
Calculate the input voltage if the final output is 10.08 V. |
| A. | 1.05 V |
| B. | 0.525 V |
| C. | 0.168 V |
| D. | 4.2 V |
| Answer» D. 4.2 V | |
| 825. |
This circuit is an example of a(n)________. |
| A. | dc voltmeter |
| B. | display driver |
| C. | instrumentation amplifier |
| D. | None of the above |
| Answer» D. None of the above | |
| 826. |
Calculate the output of the first-stage op-amp when V1 = 25 mV. |
| A. | 1.05 V |
| B. | 0.075 V |
| C. | 0.06 V |
| D. | 4.2 V |
| Answer» C. 0.06 V | |
| 827. |
How many op-amps are required to implement this equation? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 828. |
Calculate the output voltage if V1 = V2 = 0.15 V. |
| A. | 0 V |
| B. | 4.65 V |
| C. | 6.45 V |
| D. | 6.45 V |
| Answer» E. | |
| 829. |
Determine the output voltage for this circuit with a sinusoidal input of 2.5 mV. |
| A. | 0.25 V |
| B. | 0.125 V |
| C. | 0.25 V |
| D. | 0.125 V |
| Answer» C. 0.25 V | |
| 830. |
Determine the output voltage when V1 = V2 = 1 V. |
| A. | 0 V |
| B. | 2 V |
| C. | 1 V |
| D. | 2 V |
| Answer» B. 2 V | |
| 831. |
How many op-amps are required to implement this equation? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» B. 3 | |
| 832. |
What is the frequency range of application of SCRs? |
| A. | About 10 kHz |
| B. | About 50 kHz |
| C. | About 250 kHz |
| D. | About 1 mHz |
| Answer» C. About 250 kHz | |
| 833. |
A silicon diode is forward-biased. You measure the voltage to ground from the anode at ________, and the voltage from the cathode to ground at ________. |
| A. | 0 V, 0.3 V |
| B. | 2.3 V, 1.6 V |
| C. | 1.6 V, 2.3 V |
| D. | 0.3 V, 0 V |
| Answer» C. 1.6 V, 2.3 V | |
| 834. |
The term bias in electronics usually means |
| A. | the value of ac voltage in the signal. |
| B. | the condition of current through a pn junction. |
| C. | the value of dc voltages for the device to operate properly. |
| D. | the status of the diode. |
| Answer» D. the status of the diode. | |
| 835. |
Doping of a semiconductor material means |
| A. | that a glue-type substance is added to hold the material together. |
| B. | that impurities are added to increase the resistance of the material. |
| C. | that impurities are added to decrease the resistance of the material. |
| D. | that all impurities are removed to get pure silicon. |
| Answer» D. that all impurities are removed to get pure silicon. | |
| 836. |
The forward voltage across a conducting silicon diode is about |
| A. | 0.3 V. |
| B. | 1.7 V. |
| C. | 0.7 V. |
| D. | 0.7 V. |
| Answer» E. | |
| 837. |
The most common type of diode failure is a(n) ________. |
| A. | open |
| B. | short |
| C. | resistive |
| Answer» B. short | |
| 838. |
An ideal diode presents a(n) ________ when reversed-biased and a(n) ________ when forward-biased. |
| A. | open, short |
| B. | short, open |
| C. | open, open |
| D. | short, short |
| Answer» B. short, open | |
| 839. |
Reverse breakdown is a condition in which a diode |
| A. | is subjected to a large reverse voltage. |
| B. | is reverse-biased and there is a small leakage current. |
| C. | has no current flowing at all. |
| D. | is heated up by large amounts of current in the forward direction. |
| Answer» B. is reverse-biased and there is a small leakage current. | |
| 840. |
Which statement best describes an insulator? |
| A. | A material with many free electrons. |
| B. | A material doped to have some free electrons. |
| C. | A material with few free electrons. |
| D. | No description fits. |
| Answer» D. No description fits. | |
| 841. |
Effectively, how many valence electrons are there in each atom within a silicon crystal? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» D. 16 | |
| 842. |
The boundary between p-type material and n-type material is called |
| A. | a diode. |
| B. | a reverse-biased diode. |
| C. | a pn junction. |
| D. | a forward-biased diode. |
| Answer» D. a forward-biased diode. | |
| 843. |
The movement of free electrons in a conductor is called |
| A. | voltage. |
| B. | current. |
| C. | recombination. |
| D. | equilibrium. |
| Answer» C. recombination. | |
| 844. |
For a forward-biased diode, the barrier potential ________ as temperature increases. |
| A. | decreases |
| B. | remains constant |
| C. | increases |
| Answer» B. remains constant | |
| 845. |
The wide end arrow on a schematic indicates the ________ of a diode. |
| A. | ground |
| B. | direction of electron flow |
| C. | cathode |
| D. | anode |
| Answer» E. | |
| 846. |
An n-type semiconductor material |
| A. | is intrinsic. |
| B. | has trivalent impurity atoms added. |
| C. | has pentavalent impurity atoms added. |
| D. | requires no doping. |
| Answer» D. requires no doping. | |
| 847. |
A certain fiber-optic cable has the following characteristics: n1 = 1.82 and n2 = 1.73. What is the value of c? |
| A. | 71.90 |
| B. | 0.95 |
| C. | 18.1 |
| D. | 1.81 |
| Answer» B. 0.95 | |
| 848. |
An AM demodulator can be implemented with a linear multiplier followed by a ________ filter. |
| A. | low-pass |
| B. | high-pass |
| C. | band-pass |
| D. | band-stop |
| Answer» B. high-pass | |
| 849. |
The intermediate frequency in a standard AM receiver is |
| A. | 455 Hz. |
| B. | 455 kHz. |
| C. | 4.55 MHz. |
| D. | none of the above |
| Answer» C. 4.55 MHz. | |
| 850. |
Light may be propagated along a fiber-optic cable in which of the following modes? |
| A. | multimode step index |
| B. | single-mode step index |
| C. | multimode graded index |
| D. | all of the above |
| Answer» E. | |