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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. | |