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.
| 851. |
Determine the output voltage when V1 = V2 = 1 V. |
| A. | 0 V |
| B. | 2 V |
| C. | 1 V |
| D. | 2 V |
| Answer» C. 1 V | |
| 852. |
How many op-amps are required to implement this equation? Vo = V1 |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 853. |
Calculate the output voltage for this circuit when V1 = 2.5 V and V2 = 2.25 V. |
| A. | 5.25 V |
| B. | 2.5 V |
| C. | 2.25 V |
| D. | 5.25 V |
| Answer» E. | |
| 854. |
Calculate the output voltage if V1 = 0.2 V and V2 = 0 V. |
| A. | 0 V |
| B. | 6.6 V |
| C. | 4 V |
| D. | 2 V |
| Answer» E. | |
| 855. |
A number of op-amp stages can be used to provide separate gains. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 856. |
A diode conducts when it is forward-biased, and the anode is connected to the ________ through a limiting resistor. |
| A. | positive supply |
| B. | negative supply |
| C. | cathode |
| D. | anode |
| Answer» B. negative supply | |
| 857. |
As the forward current through a silicon diode increases, the internal resistance |
| A. | increases. |
| B. | decreases. |
| C. | remains the same. |
| Answer» C. remains the same. | |
| 858. |
The voltage gain of a basic instrumentation amplifier is set by a(n) |
| A. | diode. |
| B. | capacitor. |
| C. | resistor. |
| D. | inductor. |
| Answer» D. inductor. | |
| 859. |
A basic ________ amplifier is formed by three op-amps and seven resistors. |
| A. | instrumentation |
| B. | isolation |
| C. | log |
| D. | antilog |
| Answer» B. isolation | |
| 860. |
Instrumentation amplifiers are normally used to measure |
| A. | small differential signal voltages. |
| B. | signals superimposed on a common-mode voltage often much larger than the signal voltage. |
| C. | both of the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 861. |
Refer to given circuits. Which circuit is known as an OTA? |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» E. | |
| 862. |
A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is |
| A. | the diode is open. |
| B. | the diode is shorted to ground. |
| C. | the diode is internally shorted. |
| D. | the diode is working correctly. |
| Answer» D. the diode is working correctly. | |
| 863. |
Single-element semiconductors are characterized by atoms with ____ valence electrons. |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 2 |
| E. | none of the above |
| Answer» C. 5 | |
| 864. |
Under normal conditions a diode conducts current when it is |
| A. | reverse-biased. |
| B. | forward-biased. |
| C. | avalanched. |
| D. | saturated. |
| Answer» C. avalanched. | |
| 865. |
At the cutoff frequency the output is down 20 dB. |
| A. | True |
| B. | False |
| Answer» C. | |
| 866. |
The feedback signal in a Hartley oscillator is derived from an inductive voltage in the tank circuit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 867. |
A phase-locked loop (PLL) is a feedback circuit consisting of a |
| A. | phase detector. |
| B. | low-pass filter. |
| C. | VCO. |
| D. | all of the above |
| Answer» E. | |
| 868. |
Coupling and bypass capacitors affect the high-frequency response of an amplifier. |
| A. | True |
| B. | False |
| Answer» C. | |
| 869. |
The lower and upper critical frequencies of an amplifier can be determined using the step-response method. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 870. |
The basis for the decibel unit stems from the logarithmic response of the human ear to the intensity of sound. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 871. |
OLEDs can be sprayed onto a substrate using an inkjet printer. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 872. |
The silicon dioxide (SiO2) layer used in a MOSFET is ________. |
| A. | an insulator |
| B. | a conductor |
| C. | a semiconductor |
| D. | None of the above |
| Answer» B. a conductor | |
| 873. |
What is the normalized gain expressed in dB for the cutoff frequencies? |
| A. | 3 dB |
| B. | +3 dB |
| C. | 6 dB |
| D. | 20 dB |
| Answer» B. +3 dB | |
| 874. |
In which of the following are operational amplifiers (op-amps) used? |
| A. | Oscillators |
| B. | Filters |
| C. | Instrumentation circuits |
| D. | All of the above |
| Answer» E. | |
| 875. |
Determine the output voltage when V1 = V2 = 1 V. |
| A. | 0 V |
| B. | 2 V |
| C. | 1 V |
| D. | 2 V |
| Answer» E. | |
| 876. |
The term "dBm" means decibels referenced to 1 mW of power. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 877. |
Bandwidth is the difference between fcl and fcu. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 878. |
In an instrumentation amplifier, the output voltage is based on the ________ times a scale factor. |
| A. | summation of the two inputs |
| B. | product of the two inputs |
| C. | difference between the two inputs |
| D. | None of the above |
| Answer» D. None of the above | |
| 879. |
The voltage gain of a voltage buffer is ________ . |
| A. | 1 |
| B. | 0 |
| C. | 1 |
| D. | 5 |
| Answer» B. 0 | |
| 880. |
A heat sink provides ________ thermal resistance between case and air. |
| A. | a high |
| B. | a low |
| C. | the same |
| D. | None of the above |
| Answer» C. the same | |
| 881. |
In the Wien bridge oscillator with R1 = R2 = R and C1 = C2 = C, a ratio of R3 to R4 will provide sufficient loop gain for the circuit to oscillate. |
| A. | 0 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| Answer» E. | |
| 882. |
The ________ are the terminals of an SCS. |
| A. | anode, anode gate, cathode gate, and cathode |
| B. | anode, cathode, cathode gate, and gate |
| C. | anode, anode gate, cathode, and gate |
| D. | anode, cathode, and gate |
| Answer» B. anode, cathode, cathode gate, and gate | |
| 883. |
The anode gate connection can be used to turn the SCS device ________. |
| A. | on |
| B. | off |
| C. | neither on nor off |
| D. | either on or off |
| Answer» E. | |
| 884. |
You have an unknown type of diode in a circuit. You measure the voltage across it and find it to be 0.3 V. The diode might be |
| A. | a silicon diode. |
| B. | a germanium diode. |
| C. | a forward-biased silicon diode. |
| D. | a reverse-biased germanium diode. |
| Answer» C. a forward-biased silicon diode. | |
| 885. |
An OTA has |
| A. | a bias-current input terminal. |
| B. | high output impedance. |
| C. | no fixed open-loop voltage gain. |
| D. | all of the above |
| Answer» E. | |
| 886. |
A decade of frequency change is a change by a factor of 10. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 887. |
The forward voltage across an LED is typically 0.7 V. |
| A. | True |
| B. | False |
| Answer» C. | |
| 888. |
A photodiode is used in a reverse-bias position, and it will increase conduction as the light intensity increases. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 889. |
A tunnel diode has a negative-resistance characteristic. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 890. |
Two types of reverse breakdown in a zener diode are avalanche and zener. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 891. |
Schottky diodes are used primarily in high-frequency and fast-switching applications. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 892. |
Determine the value of VDSQ. |
| A. | 3.5 V |
| B. | 4.86 V |
| C. | 7.14 V |
| D. | 10 V |
| Answer» B. 4.86 V | |
| 893. |
Specification sheets typically provide the value of the constant k for enhancement-type MOSFETs. |
| A. | True |
| B. | False |
| Answer» C. | |
| 894. |
Determine the quiescent values of ID and VGS. |
| A. | 1.2 mA, 1.8 V |
| B. | 1.5 mA, 1.5 V |
| C. | 2.0 mA, 1.2 V |
| D. | 3.0 mA, 0.8 V |
| Answer» C. 2.0 mA, 1.2 V | |
| 895. |
Seldom are current levels measured since such maneuvers require disturbing the network structure to insert the meter. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 896. |
In the design of linear amplifiers, it is good design practice to choose operating points that do not crowd the saturation level or cutoff regions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 897. |
Miller's theorem is used in the high-frequency analysis of BJTs and FETs. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 898. |
One characteristic of amplifiers is that the sum of the voltage gain and the bandwidth is always constant when the roll-off is 20 dB/decade. |
| A. | True |
| B. | False |
| Answer» C. | |
| 899. |
Internal transistor capacitances affect the high-frequency response of amplifiers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 900. |
What is the response time of cadmium sulfide (CdS) in photoconductive cells? |
| A. | 100 ms |
| B. | 50 ms |
| C. | 25 ms |
| D. | 10 ms |
| Answer» B. 50 ms | |