MCQOPTIONS
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MCQOPTIONS
This section includes 93 Mcqs, each offering curated multiple-choice questions to sharpen your Active Filter Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
OLEDs can be sprayed onto a substrate using an inkjet printer. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Schottky diodes are used primarily in high-frequency and fast-switching applications. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The forward voltage across an LED is typically 0.7 V. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
When no light is emitted from an LED, the forward current is almost negligible and is called the dark current. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
With varactor diodes, junction capacitance varies with the amount of forward-bias voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The ability to keep the reverse current essentially constant is the key feature of the zener diode. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Two types of reverse breakdown in a zener diode are avalanche and zener. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
A tunnel diode has a negative-resistance characteristic. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
An LED emits light when forward-biased. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
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 | |
| 11. |
The regulating ability of zener diodes depends on their ability to operate in a forward-bias condition. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Refer to this figure. Identify the Schottky diode. |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| E. | e |
| Answer» F. | |
| 13. |
Refer to this figure. If VIN decreases, IR will |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| Answer» C. remain the same. | |
| 14. |
Refer to this figure. If VIN increases, IZ will |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| Answer» B. decrease. | |
| 15. |
Refer to this figure. If VIN attempts to increase, VR will |
| A. | increase. |
| B. | decrease. |
| C. | remain the same. |
| Answer» B. decrease. | |
| 16. |
Refer to this figure. If the load current increases, IR will ________ and IZ will ________. |
| A. | remain the same, increase |
| B. | decrease, remain the same |
| C. | increase, remain the same |
| D. | remain the same, decrease |
| Answer» E. | |
| 17. |
An 8.2 V zener has a resistance of 5. The actual voltage across its terminals when the current is 25 mA is |
| A. | 8.2 V. |
| B. | 125 mV. |
| C. | 8.325 V. |
| D. | 8.075 V. |
| Answer» D. 8.075 V. | |
| 18. |
Meristem culture of banana enables |
| A. | rapid multiplication |
| B. | elimination of bunch top virus disease |
| C. | both (a) and (b) |
| D. | slow growth |
| Answer» D. slow growth | |
| 19. |
MS medium, is found essential for initial morphogenesis of the immature embryos and to enhance callus development, when supplemented with |
| A. | GA3 |
| B. | GA3 and coconut milk |
| C. | adenine |
| D. | adenine and kinetin |
| Answer» C. adenine | |
| 20. |
Which of the following constituent/(s) is/are added to help in speedy generation of meristem culture in case of Ipomoea batatas improvement? |
| A. | Auxins |
| B. | Cytokinins |
| C. | Both (a) and (b) |
| D. | Adenine |
| Answer» D. Adenine | |
| 21. |
Cultivated tomato species (Lycopersicon esculentum) has a high degree of resistance towards |
| A. | Meloidogyne spp.nematodes |
| B. | L. peruviaanum |
| C. | both (a) and (b) |
| D. | Solarium melongena |
| Answer» C. both (a) and (b) | |
| 22. |
Protoplast fusion technique generally involves |
| A. | isolation only |
| B. | isolation and fusion |
| C. | isolation, fusion and culturing |
| D. | hybridization between two species |
| Answer» D. hybridization between two species | |
| 23. |
Cultivated tomato species (Lycopersicon esculentum) is highly susceptible to |
| A. | Meloidogyne spp. nematodes |
| B. | L. peruviaanum |
| C. | both (a) and (b) |
| D. | Solarium melongena |
| Answer» B. L. peruviaanum | |
| 24. |
cDNA clone prepared to stigma mRNA of Brassica oleracea can be used as a probe on DNA digests of segregating populations to recognize |
| A. | Aegilops |
| B. | Triticum |
| C. | Both (a) and (b) |
| D. | S alleles |
| Answer» E. | |
| 25. |
Which of the following mutant/(s) has/have increased amount of lysine and/or methionine in corn seeds? |
| A. | Opaque-2 |
| B. | Sugary-1 |
| C. | Flory-2 |
| D. | All of these |
| Answer» E. | |
| 26. |
When the transposon jumps into an otherwise functional gene, it has the effect of |
| A. | blocking correct transcription |
| B. | initiating correct transcription |
| C. | propagating correct transcription |
| D. | initiating some genetic codes |
| Answer» B. initiating correct transcription | |
| 27. |
Wheat variety Rendezvous, with resistance to eye spot (Pseudo-cercosporella herpotrichoides) derived from Aegilops ventricosa, has a chloroplast genome derived from |
| A. | Aegilops |
| B. | Triticum |
| C. | Both (a) and (b) |
| D. | S alleles |
| Answer» B. Triticum | |
| 28. |
Microinjection technique of introducing NA is a |
| A. | physical method |
| B. | biological method |
| C. | combination of physical and biological method |
| D. | chemical method |
| Answer» B. biological method | |
| 29. |
Somaclonal variation method refers to |
| A. | heritable changes |
| B. | genetic isolation |
| C. | small number of species having limited commercial potential |
| D. | large number of plant cells |
| Answer» B. genetic isolation | |
| 30. |
Cytoplast (somatic cell hybridization) is the process in which |
| A. | two protoplast along with their nuclei fuse |
| B. | a normal protoplast along with an enucleated protoplast fuse |
| C. | both (a) and (b) |
| D. | two enucleated protoplasts fuse |
| Answer» D. two enucleated protoplasts fuse | |
| 31. |
Plant tissue culture technique is used to select somaclones that are |
| A. | resistant to herbicide |
| B. | not resistant to herbicide |
| C. | resistant to insecticides |
| D. | not resistant to insecticides |
| Answer» B. not resistant to herbicide | |
| 32. |
Which of the following is the class of hybridization? |
| A. | Intervarietal |
| B. | Interspecific |
| C. | Intergeneric |
| D. | all of these |
| Answer» E. | |
| 33. |
α and β cyclo dextrins are used for |
| A. | pharmaceutical delivery system |
| B. | flavour and odour enhancement in foods |
| C. | removal of undesired compounds like caffeine from foods |
| D. | all of the above |
| Answer» E. | |
| 34. |
α and β cyclo dextrins are produced by |
| A. | transgenic tomato |
| B. | transgenic maize |
| C. | transgenic potato |
| D. | transgenic wheat |
| Answer» D. transgenic wheat | |
| 35. |
Human serum albumin in case of transgenic plant is secreted in |
| A. | transgenic leaf tissues |
| B. | transgenic root tissues |
| C. | is not secreted out of plant |
| D. | transgenic stem tissues |
| Answer» B. transgenic root tissues | |
| 36. |
In transgenic plants of Arabidipsis thaliana which of the following gene is transferred for the synthesis of PHB (polyhdroxybutyrate)? |
| A. | Acetyl Co A reductase |
| B. | Polyhydroxybutyrate synthease |
| C. | Both (a) and (b) |
| D. | Pyrophosphorylase |
| Answer» D. Pyrophosphorylase | |
| 37. |
Refer to Figure 20-2. This circuit is a setup for |
| A. | an antilog amplifier |
| B. | a constant-current source |
| C. | an instrumentation amplifier |
| D. | an isolation amplifier |
| Answer» C. an instrumentation amplifier | |
| 38. |
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. | |
| 39. |
What part of the characteristic curve of a diode is useful for log amplifiers? |
| A. | the log region above 0.7 V |
| B. | the log region below 0.7 V |
| C. | the log region between 0 V and 0.7 V |
| D. | the log region below the zener voltage |
| Answer» D. the log region below the zener voltage | |
| 40. |
In logarithmic signal compression, |
| A. | large and small voltages are compressed equally. |
| B. | large voltages are compressed more than small voltages. |
| C. | large voltages are compressed less than smaller voltages. |
| D. | none of the above |
| Answer» C. large voltages are compressed less than smaller voltages. | |
| 41. |
What is a key characteristic of an instrumentation amplifier? |
| A. | high CMRR |
| B. | high output offset |
| C. | high output impedance |
| D. | none of the above |
| Answer» B. high output offset | |
| 42. |
The log of a number is the |
| A. | base to which the power must be raised to get that number. |
| B. | power to which the base must be raised to get that number. |
| C. | base of that number. |
| D. | power of that number. |
| Answer» C. base of that number. | |
| 43. |
The OTA has a ________ input impedance and a ________ CMRR. |
| A. | high, low |
| B. | low, high |
| C. | high, high |
| D. | low, low |
| Answer» D. low, low | |
| 44. |
Transconductance is the ratio of the output |
| A. | current to the input voltage. |
| B. | current to the input current. |
| C. | voltage to the input voltage. |
| D. | voltage to the input current. |
| Answer» B. current to the input current. | |
| 45. |
The process known as signal compression is used with a(n) ____ amplifier. |
| A. | log |
| B. | antilog |
| C. | instrumentation |
| D. | isolation |
| Answer» B. antilog | |
| 46. |
A(n) ________ amplifier provides "a barrier" between the input and output for the protection of human life or sensitive equipment. |
| A. | instrumentation |
| B. | isolation |
| C. | operational transconductance |
| D. | voltage-to-current |
| Answer» C. operational transconductance | |
| 47. |
An antilog amplifier has a ________ in series with the input. |
| A. | BJT |
| B. | diode |
| C. | diode or BJT |
| D. | resistor |
| Answer» D. resistor | |
| 48. |
The main difference between the isolation amplifier and an instrumentation amplifier is |
| A. | an instrumentation amplifier has an input stage. |
| B. | an instrumentation amplifier has an output stage. |
| C. | an instrumentation amplifier has a differential stage. |
| D. | the input, output, and power supply stages of an isolation amplifier are all electrically isolated from each other. |
| Answer» E. | |
| 49. |
The operational transconductance amplifier (OTA) is primarily a ________ -to- ________ amplifier. |
| A. | current, voltage |
| B. | voltage, current |
| C. | current, resistance |
| D. | resistance, current |
| Answer» C. current, resistance | |
| 50. |
A constant-current source delivers a load current that |
| A. | remains constant when the load resistance changes. |
| B. | varies with load resistance. |
| C. | varies inversely with load resistance. |
| D. | varies inversely with input voltage. |
| Answer» B. varies with load resistance. | |