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Circuits MCQ

1. Thermocouple is a

Voltage generator

Two dissimilar metals welded together

Temperature sensor

Temperature transducer

Answer

Correct Answer: Temperature transducer

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2. What is a junction?

The area where the p-type material and n-type material meet in a semiconductor.

A device used to connect two or more electrical circuits.

A point at which two or more streets meet.

Contact or connection between two or more wires or cables.

Answer

Correct Answer: Contact or connection between two or more wires or cables.

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3. What is the unit of work and energy?

Meter

Joule

Ampere

Kilogram

Answer

Correct Answer: Joule

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4. What does JFET stand for?

"junction field effect transistor"

"junior field effect transistor"

"jewelers for estheticbe and Thornycroft"

"junction forward-biased electrode transistor"

Answer

Correct Answer: "junction field effect transistor"

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5. What is a Jack?

RCA jack

3.5mm audio jack

Socket or connector into which a plug may be inserted.

Phone jack

Answer

Correct Answer: Socket or connector into which a plug may be inserted.

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6. What is insulation resistance?

The ability to resist an electric current

The ability to resistTouching hot surfaces

Resistance of insulating material

The ability to resist sentimental attachment

Answer

Correct Answer: Resistance of insulating material

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7. What is the definition of insulating material?

A material that is good conductor of electricity

A material that is poor conductor of electricity.

A material that is poor conductor of heat

Material that will prevent the flow of current due to its chemical composition.

Answer

Correct Answer: Material that will prevent the flow of current due to its chemical composition.

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8. What is an insulating material?

A material that is conductive due to its chemical composition.

A material that is neither conductive nor insulating.

A material that allows the flow of current due to its chemical composition.

A material that prevents the flow of current due to its chemical composition.

Answer

Correct Answer: A material that prevents the flow of current due to its chemical composition.

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9. What does it mean when a material is insulated?

When a material is made to be heat resistant

When a non conducting material is used to isolate conducting materials from one another.

When a material is made to be nonconducting

When a material is made to be waterproof

Answer

Correct Answer: When a non conducting material is used to isolate conducting materials from one another.

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10. What is input impedance?

The voltage across the input terminals of a device

The power dissipated in the input terminals of a device

Opposition to the flow of signal current at the input of a circuit or load.

The current through the input terminals of a device

Answer

Correct Answer: Opposition to the flow of signal current at the input of a circuit or load.

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11. What is the name of the heat radiation whose frequencies are above the microwave frequency band and below red in the visible band?

Blue

Green

Red

Infrared

Answer

Correct Answer: Infrared

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12. What is the primary function of an inductor?

To act as a capacitor

To introduce inductance into a circuit

To act as a resistor

To block DC current

Answer

Correct Answer: To introduce inductance into a circuit

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13. What is the main reason for wrapping the conductor into a coil?

To minimize the resistance

To maximize the inductance

To introduce inductance into a circuit

To concentrate the magnetic lines of force

Answer

Correct Answer: To concentrate the magnetic lines of force

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14. What is the state of a material called when it emits light after being heated?

Phosphorescence

Incandescence

Translucence

Fluorescence

Answer

Correct Answer: Incandescence

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15. What is impedance?

The transfer of electrons through a conductor

The total opposition to the flow of current offered by a circuit

The rate of voltage or current in a circuit

The rate at which energy is used up in a circuit

Answer

Correct Answer: The total opposition to the flow of current offered by a circuit

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16. What is the full form for IGFET?

Insulated gate field effect transistor

Integrated gate field effect transistor

Indium gallium ferrite

Insulated gate field emission transistor

Answer

Correct Answer: Insulated gate field effect transistor

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17. What is an IC voltage regulator used for?

To hold the output voltage of a power supply constant over a wide range of load variations.

To regulate the voltage and current in a circuit.

To deliver a constant voltage to a load.

To hold the input voltage of a power supply constant over a wide range of load variations.

Answer

Correct Answer: To hold the output voltage of a power supply constant over a wide range of load variations.

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18. What does IC stand for?

Integrated circuit

Induced current

Internal combustion

Interest charge

Answer

Correct Answer: Integrated circuit

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19. What does Hertz measure?

Frequency

Length

Time

Mass

Answer

Correct Answer: Frequency

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20. What is the unit of frequency equal to one cycle per second?

M (meter)

Mol (mole)

Hz (Hertz)

A (Ampere)

Answer

Correct Answer: Hz (Hertz)

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21. What is the basic unit of inductance?

Ampere

Coulomb

Henry

Tesla

Answer

Correct Answer: Henry

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22. What does a half wave rectifier do?

Converts DC to AC

Converts AC to pulsating DC by eliminating either the negative or the positive alternation of each input AC cycle.

Does not convert AC to DC

Converts AC to DC by eliminating either the negative or the positive alternation of each input AC cycle.

Answer

Correct Answer: Converts AC to pulsating DC by eliminating either the negative or the positive alternation of each input AC cycle.

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23. What does a ground do in an electrical circuit?

A ground is used as a way to connect two circuits together.

A ground is used to protect against electrical shocks.

A ground is used as the common wiring point or reference in a circuit.

Answer

Correct Answer: A ground is used as the common wiring point or reference in a circuit.

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24. What is the metric prefix for 1 billion?

Giga

Kilo

Deci

Peta

Answer

Correct Answer: Giga

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25. What is a generator?

A device used to convert heat energy to electrical energy.

A device used to convert electrical energy to mechanical energy.

A device used to convert mechanical energy to heat energy.

A device used to convert mechanical energy to electrical energy.

Answer

Correct Answer: A device used to convert mechanical energy to electrical energy.

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26. What does FF stand for in the context of Flip Flops?

Finite Field

Flag Field

Flip Flop

Free For All

Answer

Correct Answer: Flip Flop

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27. What is an abbreviation for Flip Flop?

Answer

Correct Answer: FF

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28. What is a filter?

A device used to clean air

A device used to clean oil

A network consisting of capacitors, resistors and/or inductors used to pass certain frequencies and block others.

A device used to clean water

Answer

Correct Answer: A network consisting of capacitors, resistors and/or inductors used to pass certain frequencies and block others.

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29. What is the main purpose of a filter in a network?

To pass certain frequencies and block others.

To boost the signal strength

To create a delay in the signal

To amplify the signal

Answer

Correct Answer: To pass certain frequencies and block others.

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30. What is a filament?

The basic structure of an atom

A measure of the amount of extra current in a circuit

A device used to measure electrical resistance

A thin thread of carbon or tungsten which produces heat or light with the passage of current.

Answer

Correct Answer: A thin thread of carbon or tungsten which produces heat or light with the passage of current.

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31. What does a filament produce with the passage of current?

Sound

Movement

Electricity

Heat or light

Answer

Correct Answer: Heat or light

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32. What does FET stand for?

Field effect transistor

Front end transistor

Field emission transistor

Fluorescent emission transistor

Answer

Correct Answer: Field effect transistor

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33. What is the abbreviation for Field effect transistor?

FET

GDT

VET

EDT

Answer

Correct Answer: FET

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34. What carrying information between two points?

Sound

Fiber optics

Internet

Electricity

Answer

Correct Answer: Fiber optics

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35. What is the information that is conveyed by the fiber optics?

Laser's light output

Images that are magnified by the fiber

The time it takes for light to travel through the fiber

The color of light that is being emitted by the fiber

Answer

Correct Answer: Laser's light output

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36. What are ferrites used for?

To study the stars

To make electromagnets

To clean teeth

To make glass

Answer

Correct Answer: To make electromagnets

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37. What is a ferrite?

A device used to measure magnetic fields.

A metal alloy.

A compound composed of carbon and iron.

A compound composed of iron oxide, a metallic oxide and ceramic.

Answer

Correct Answer: A compound composed of iron oxide, a metallic oxide and ceramic.

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38. What is a ferrite-core inductor?

An inductor wound on a ferrite core.

A device used to measure inductance

The opposition to the flow of direct current by an inductor

A measure of a material's ability to store magnetic energy

Answer

Correct Answer: An inductor wound on a ferrite core.

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39. What is an inductor wound on a ferrite core?

Resistor

Semiconductor

Capacitor

Ferrite-core inductor

Answer

Correct Answer: Ferrite-core inductor

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40. What is a ferrite bead?

A type of capacitor

Inductance of a wire

A type of resistor

Ferrite composition in the form of a bead

Answer

Correct Answer: Ferrite composition in the form of a bead

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41. What is the purpose of a ferrite bead?

To provide inductance to a circuit

To decrease the inductance of a wire

To block radio frequencies

To increase the inductance of a wire

Answer

Correct Answer: To increase the inductance of a wire

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42. What is the main advantage of Ferrite?

High frequency range

Good magnetic permeability

High resistivity

Eddy current losses are low at high frequencies

Answer

Correct Answer: Eddy current losses are low at high frequencies

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43. What is the full name for the element Fe?

Iron

Lead

Boron

Mercury

Answer

Correct Answer: Iron

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44. What is the name of the transistor in which there are no charge carriers in the channel when the gate source voltage is zero?

JFET

Enhancement-mode MOSFET

Depletion-mode MOSFET

Field effect transistor

Answer

Correct Answer: Enhancement-mode MOSFET

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45. What is the emitter?

The base of a bipolar junction transistor.

The collector of a bipolar junction transistor.

The semiconductor region that separates the collector and base regions of a bipolar junction transistor.

The semiconductor region from which charge carriers are injected into the base of a bipolar junction transistor.

Answer

Correct Answer: The semiconductor region from which charge carriers are injected into the base of a bipolar junction transistor.

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46. What is the purpose of the core in an electromagnet?

It makes the electromagnet more powerful.

It concentrates the field in the coil.

It generates the magnetic field.

It provides an easy path for the magnetic lines of force.

Answer

Correct Answer: It provides an easy path for the magnetic lines of force.

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47. What is a capacitor having an electrolyte between the two plates called?

Decoupling capacitor

PFC capacitor

Electrolytic capacitor

Motor capacitor

Answer

Correct Answer: Electrolytic capacitor

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48. What is electric polarization?

The rearrangement of charges in a certain area

A change in the dielectric constant in a certain area

A displacement of bound charges in a dielectric when placed in an electric field.

A change in the electric field in a certain area

Answer

Correct Answer: A displacement of bound charges in a dielectric when placed in an electric field.

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49. Electrical current produced by the movement of free electrons is known as?

Circuit

Electric field

Voltage

Electron flow

Answer

Correct Answer: Electron flow

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50. What is the direction of electron flow?

Same as current

From negative to positive terminal

From positive to negative terminal

Opposite to that of current

Answer

Correct Answer: Opposite to that of current

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51. What is an electron?

An arbitrary unit of electric current.

A subatomic particle that orbits the nucleus.

The most abundant element in the universe.

A subatomic particle of an atom with a negative charge that orbits the positively-charged nucleus.

Answer

Correct Answer: A subatomic particle of an atom with a negative charge that orbits the positively-charged nucleus.

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52. What is electric charge also known as?

An electric dipole

A static charge.

Electromagnetic radiation

A magnetic field

Answer

Correct Answer: A static charge.

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53. What is electric charge?

Electric energy stored on the surface of a material.

Energy produced by moving electrons

A measure of the force between two objects

The number of protons in an atom

Answer

Correct Answer: Electric energy stored on the surface of a material.

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54. What causes an eddy current?

Change in magnetic flux

Moving through a uniform magnetic field

Change in electric potential

Moving through a non-uniform magnetic field

Answer

Correct Answer: Moving through a non-uniform magnetic field

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55. What is a DIAC?

A device that measures resistance

A device that measures current

A diode that conducts elecrical only after its breakover voltage has been reached.

A device that measures voltage

Answer

Correct Answer: A diode that conducts elecrical only after its breakover voltage has been reached.

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56. What is the time for collector current to reach 10% of its maximum value in a BJT switching circuit?

Propagation time

Rise time

Delay time

Answer

Correct Answer: Delay time

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57. What is the logarithmic representation of gain or loss?

Power domain

Frequency domain

Decibel - (dB)

Time domain

Answer

Correct Answer: Decibel - (dB)

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58. What is a Decade?

A unit of length

A frequency factor of ten

A unit of time

A synonym for a year

Answer

Correct Answer: A frequency factor of ten

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59. What is a dead short?

A circuit with high resistance

A circuit with low resistance

Short circuit having zero resistance

A short story

Answer

Correct Answer: Short circuit having zero resistance

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60. What is the full form of DC?

Direct Current

Data Centre

Dual Core

Dual Colour

Answer

Correct Answer: Direct Current

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61. What is DC power supply?

DC power is not a source of power.

DC power cannot be used for electrical equipment.

Any source of DC power for electrical equipment.

Any source of AC power for electrical equipment.

Answer

Correct Answer: Any source of DC power for electrical equipment.

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62. What is a DC load line?

A graph representing the voltage and current for a given load resistor in an amplifier

A graph representing all possible combinations of voltage and current for a given amplifier

A graph representing all possible combinations of voltage and current for a given load resistor in an amplifier.

A load resistor in an amplifier

Answer

Correct Answer: A graph representing all possible combinations of voltage and current for a given load resistor in an amplifier.

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63. What does the abbreviation "DC" stand for?

Direct Current

Dual Core

Dixon County

Data Collection

Answer

Correct Answer: Direct Current

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64. What is the connected configuration of two bipolar junction transistors called?

Common-collector configuration

Common-emitter configuration

Common-base configuration

Darlington pair

Answer

Correct Answer: Darlington pair

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65. What is Damping?

Oscillation of a system about a point of equilibrium in the absence of external forces.

Undamped Harmonic Motion

Oscillatory motion of an object where the restoring force is directly proportional to the displacement.

Reduction in magnitude of oscillation due to energy being dissipated as heat.

Answer

Correct Answer: Reduction in magnitude of oscillation due to energy being dissipated as heat.

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66. What is the unit of damping?

Unit of energy

Reduction in magnitude of oscillation

Derived unit of heat

SI unit of heat

Answer

Correct Answer: Reduction in magnitude of oscillation

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67. What does the abbreviation "DAC" stand for?

Data access control

Digital audio converter

Direct access control

Digital to analog converter

Answer

Correct Answer: Digital to analog converter

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68. What is the definition of a center tap?

Midway connection between the two ends of a winding

The process of creating a hole in the center of an object

A method of winding where the wire is wrapped around the object from the center outward

The point in an electrical circuit where the current is divided into two paths

Answer

Correct Answer: Midway connection between the two ends of a winding

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69. What is a Cathode?

A device that produces or amplifies an electric current by inducing the flow of electrons in an external circuit.

A negatively charged electrode

A device used to produce x-rays.

A device used to focus an electron beam.

Answer

Correct Answer: A negatively charged electrode

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70. What is a carbon resistor made of?

Silver

Copper wire

Carbon granules mixed with a binder

Gold

Answer

Correct Answer: Carbon granules mixed with a binder

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71. What is a carbon resistor?

A fixed value made by mixing carbon granules with a binder which is molded and then not baked.

A resistor of changing value made by mixing carbon granules with a binder which is molded and then baked.

A fixed value made by mixing carbon granules with a binder which is not molded and then baked.

A resistor of fixed value made by mixing carbon granules with a binder which is molded and then baked.

Answer

Correct Answer: A resistor of fixed value made by mixing carbon granules with a binder which is molded and then baked.

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72. What causes a change in resistance in a carbon microphone?

Vibration in the air

Movement of the diaphragm

Pressure variation in carbon granules

Change in temperature

Answer

Correct Answer: Pressure variation in carbon granules

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73. What is a carbon-film resistor?

Component made of carbon and ceramic

Device made by depositing a thin carbon film on a ceramic form.

Made of thin carbon film

Device made by depositing a thin carbon film on a semiconductor

Answer

Correct Answer: Device made by depositing a thin carbon film on a ceramic form.

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74. What is a capacitor?

A measure of a capacitor's ability to store an electric charge.

The SI unit of capacitance.

The rate of flow of charge through a capacitor.

An electronic component having capacitive reactance.

Answer

Correct Answer: An electronic component having capacitive reactance.

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75. What is the basic unit of capacitance?

Volt

Ohm

Ampere

Farad

Answer

Correct Answer: Farad

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76. What is capacitance?

The ability of a capacitor to store an electrical charge.

The ability of an insulator to store an electrical charge.

The ability to store an electrical current.

The ability of a conductor to store an electrical charge.

Answer

Correct Answer: The ability of a capacitor to store an electrical charge.

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77. What is calibration?

To adjust the correct value of a reading by comparison to a standard.

To fix the malfunctioning of an electronic device

To changing the value of a meter

To testing the accuracy of a measuring instrument

Answer

Correct Answer: To adjust the correct value of a reading by comparison to a standard.

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78. What does "CAD" stand for?

"computer administered design"

"computer assisted design"

"computer automated design"

"computer aided designs"

Answer

Correct Answer: "computer aided designs"

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79. What does the abbreviation "CAD" stand for?

Computer aided designs

Computer assisted designs

Central auditory processing

Corrective action request

Answer

Correct Answer: Computer aided designs

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80. What is a cable?

A group of two or more insulated wires

A group of two or more wires that are not insulated

A group of two or more uninsulated wires

A group of two or more wires that are not connected

Answer

Correct Answer: A group of two or more insulated wires

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81. Which among the following is not a characteristic of a Bipolar junction transistor?

Emitter to collector current is controlled by base current

It has gain

Output current is proportional to input current

Three terminal device

Answer

Correct Answer: Three terminal device

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82. What is a Bipolar junction transistor?

A two terminal device

A four terminal device

A three terminal device in which emitter to collector current is controlled by base current.

A device used to amplify or switch electronic signals and power.

Answer

Correct Answer: A three terminal device in which emitter to collector current is controlled by base current.

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83. What is the base of a binary number system?

Answer

Correct Answer: 2

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84. What is the name given to a number system having only two symbols?

Binary

Hexadecimal

Decimal

Ternary

Answer

Correct Answer: Binary

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85. What does DC voltage applied to a device to control its operation mean?

Voltage

Bias

Efficiency

Power

Answer

Correct Answer: Bias

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86. What is Bias?

A DC voltage applied to a device to control its operation.

An AC voltage applied to a device to control its operation.

The average value of the output voltage of a device.

The difference in voltage between the positive and negative terminals of a device.

Answer

Correct Answer: A DC voltage applied to a device to control its operation.

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87. What is a baud?

A unit of frequency

A unit of data storage

A unit of speed

A unit of signaling speed equal to the number of signal events per second

Answer

Correct Answer: A unit of signaling speed equal to the number of signal events per second

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88. What does a battery convert energy to?

Wind

Solar

Electrical

Chemical

Answer

Correct Answer: Electrical

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89. What is a battery?

An AC voltage source

A device that converts electrical energy to chemical energy

A DC voltage source containing two or more cells that convert chemical energy to electrical energy.

A DC voltage source

Answer

Correct Answer: A DC voltage source containing two or more cells that convert chemical energy to electrical energy.

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90. What is the base?

The emitter of a transistor

The collector of a transistor

The region that lies between the emitter and collector of a bipolar junction transistor (BJT).

The layer between p-type and n-type semiconductor

Answer

Correct Answer: The region that lies between the emitter and collector of a bipolar junction transistor (BJT).

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91. Which of the following is not a part of a transistor?

Emitter

Gate

Collector

Base

Answer

Correct Answer: Base

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92. What does the abbreviation BW stand for?

Bandwidth Data

British West Indies

Basic Wireless

Bandwidth

Answer

Correct Answer: Bandwidth

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93. What does bandwidth refer to?

The numerical difference between upper and lower frequencies of a band of electromagnetic radiation

The width of a band of electromagnetic radiation

The size of a digital image file

The amount of data that can be transmitted over a network connection

Answer

Correct Answer: The numerical difference between upper and lower frequencies of a band of electromagnetic radiation

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94. Which of the following is NOT a part of a band-stop filter?

Answer

Correct Answer: F1

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95. What is the main purpose of a band-pass filter?

To pass a band of frequencies between a lower cut-off frequency (f1) and a higher cut-off frequency (f2)

To heavily attenuate frequencies above and below the pass band

To pass all frequencies between a lower cut-off frequency (f1) and a higher cut-off frequency (f2)

To only pass frequencies above the lower cut-off frequency (f1)

Answer

Correct Answer: To pass a band of frequencies between a lower cut-off frequency (f1) and a higher cut-off frequency (f2)

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96. What is a balanced bridge?

Condition that occurs when a bridge circuit is adjusted to produce a zero output.

A bridge that is in perfect balance

A bridge that is not in perfect balance

A bridge that is dangerous

Answer

Correct Answer: Condition that occurs when a bridge circuit is adjusted to produce a zero output.

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97. Voltage with no polarity

A voltage with constant polarity

A voltage with unpredictable polarity

A voltage with alternating polarity

Answer

Correct Answer: A voltage with alternating polarity

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98. What does BJT stand for?

Base junction transistor

Bipolar junction transistor

Battery junction transistor

Basejam transistor

Answer

Correct Answer: Bipolar junction transistor

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99. What is active region?

The region of IGBT (insulated-gate bipolar transistor) operation between saturation and cutoff used for linear amplification.

The region of BJT operation between saturation and cutoff used for linear amplification.

The region of FET (field-effect transistor) operation between saturation and cutoff used for linear amplification.

The region of MOSFET (metal-oxide-semiconductor field-effect transistor) operation between saturation and cutoff used for linear amplification.

Answer

Correct Answer: The region of BJT operation between saturation and cutoff used for linear amplification.

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100. What does an active filter use?

An amplifier

A phone

A microphone

A computer

Answer

Correct Answer: An amplifier

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101. What is an active component?

A component that changes the frequency of a signal between output and input.

A component that changes the amplitude of a signal between output and input.

A component that does not change the amplitude of a signal between output and input.

A component that changes the phase of a signal between output and input.

Answer

Correct Answer: A component that changes the amplitude of a signal between output and input.

Note: This Question is unanswered, help us to find answer for this one

102. What does an active component do?

Change the frequency of a signal between output and input.

Change the phase of a signal between output and input.

Does not change the amplitude of a signal between output and input.

Changes the amplitude of a signal between output and input.

Answer

Correct Answer: Changes the amplitude of a signal between output and input.

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103. What does AC stand for in AC power supply?

Automated Current

Apartment Complex

Alternating Current

Average Current

Answer

Correct Answer: Alternating Current

Note: This Question is unanswered, help us to find answer for this one

104. What does AC load line represent?

AC input voltage and current for an amplifier

DC output voltage and current for an amplifier

AC output voltage and current for an amplifier

AC impedance and current for an amplifier

Answer

Correct Answer: AC output voltage and current for an amplifier

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105. What is an AC load line?

A graph representing all possible combinations of AC output voltage and current for an amplifier.

A graph representing all possible combinations of DC output voltage and current for an amplifier.

A graph representing all possible combinations of AC output power and current for an amplifier.

A graph representing all possible combinations of AC input voltage and current for an amplifier.

Answer

Correct Answer: A graph representing all possible combinations of AC output voltage and current for an amplifier.

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106. What is an AC generator?

A device that transforms AC electrical power into mechanical energy.

A device that transforms mechanical energy into AC electrical power.

A device that transforms mechanical energy into DC electrical power.

A device that transforms DC electrical power into mechanical energy.

Answer

Correct Answer: A device that transforms mechanical energy into AC electrical power.

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107. What does AC/DC stand for?

Air conditioning/drying chamber

Alternating current/direct current

Amplitude communication/direct current

Equipment that will operate from an AC or DC power source.

Answer

Correct Answer: Equipment that will operate from an AC or DC power source.

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108. What does AC coupling do?

Decreases the frequency of an AC signal.

Increases the amplitude of an AC signal.

Allows only a DC voltage to pass.

Passes an AC signal while blocking a DC voltage.

Answer

Correct Answer: Passes an AC signal while blocking a DC voltage.

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109. What does AC coupling stand for?

An alternating current (AC) capacitor-input filter

Circuit that passes an AC signal while blocking a DC voltage.

Circuit that passes a DC signal while blocking an AC voltage.

A device used to connect two pieces of audio equipment together

Answer

Correct Answer: Circuit that passes an AC signal while blocking a DC voltage.

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110. What does AC stand for?

Area code

Amplitude modulation

Arithmetic mean

Alternating current

Answer

Correct Answer: Alternating current

Note: This Question is unanswered, help us to find answer for this one

Applied Engineering MCQs | Topic-wise

MCQ on Advanced Electrical/Mechanical Systems	MCQ on Applied Mechanics
MCQ on Basic Applied Engineering	MCQ on Circuits
MCQ on Design & Analysis of Control Systems	MCQ on Electrical Systems
MCQ on Engineering Computation	MCQ on Engineering Economic Analysis
MCQ on Engineering Materials and Processes	MCQ on Foundations of Engineering
MCQ on General Chemistry	MCQ on Hydraulics and Pneumatics
MCQ on Manufacturing Processes	MCQ on Mechanical Measurements & Instrumentation
MCQ on Mechanical Systems	MCQ on Motors & Controls
MCQ on Principles of Microeconomics	MCQ on Reliability and Failure Analysis
MCQ on Senior Design Project	MCQ on Signal Analysis and Communications
General Applied Engineering MCQs