Circuits MCQ

1. Ammeters should be connected ________ with the circuit being tested.

Answer

Correct Answer: In series

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2. What is the temperature coefficient of resistance for a thermistor?

Answer

Correct Answer: Negative

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3. What does thermal stability refer to?

Answer

Correct Answer: The ability of a circuit to maintain stable characteristics in spite of increased temperature.

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4. What is the definition of a terminal?

Answer

Correct Answer: Point at which electrical connections are made

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5. What is the meaning of "Terminal"?

Answer

Correct Answer: Point at which electrical connections are made.

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6. What does the metric prefix "tera" represent?

Answer

Correct Answer: 1012

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7. What does the temperature coefficient of frequency represent?

Answer

Correct Answer: Rate at which frequency changes with temperature.

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8. What is a tantalum capacitor?

Answer

Correct Answer: Electrolytic capacitor having a tantalum foil anode.

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9. In a series circuit, what path does the current follow?

Answer

Correct Answer: Through the circuit

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10. In a series circuit, what components are connected end to end?

Answer

Correct Answer: All of the components

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11. What is a semiconductor?

Answer

Correct Answer: An element which is neither a good conductor nor a good insulator, but rather lies somewhere between the two.

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12. Which of the following is not a semiconductor?

Answer

Correct Answer: Carbon

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13. What is the gate bias for a field effect transistor called?

Answer

Correct Answer: Self biasing

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14. What is a secondary cell?

Answer

Correct Answer: Electrolytic cell used to store electricity

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15. What is the secondary winding of a transformer?

Answer

Correct Answer: Winding that is connected to a load.

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16. What is a Schottky diode?

Answer

Correct Answer: A high speed diode that has very little junction capacitance.

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17. What is the output of a Schmitt trigger circuit?

Answer

Correct Answer: Square wave

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18. What is a schematic diagram?

Answer

Correct Answer: A diagram of an electrical or electronic circuit with the components represented by their symbols.

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19. What is the name of the waveform that rises from zero to maximum value linearly, drops back to zero and repeats?

Answer

Correct Answer: Saw Tooth Wave

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20. What is the name for a waveform that repeats itself?

Answer

Correct Answer: Repeating waveform

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21. What is a rectifier?

Answer

Correct Answer: A diode circuit that converts alternating current into pulsating direct current.

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22. What is the main function of a rectifier?

Answer

Correct Answer: Converts alternating current into pulsating direct current.

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23. What is rectification?

Answer

Correct Answer: The process that converts alternating current to direct current.

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24. What is the other name for a Rectangular wave?

Answer

Correct Answer: Pulse wave

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25. What is a repeating wave that only operates between two levels or values called?

Answer

Correct Answer: Rectangular wave

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26. What are the straight-line axes of a rectangular coordinate system?

Answer

Correct Answer: Perpendicular

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27. What is the name of a coordinate system whose straight-line axes or coordinate planes are perpendicular?

Answer

Correct Answer: Rectangular coordinate system

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28. Recombination is the process by which an electron gives up energy to fall into a hole.

Answer

Correct Answer: True

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29. What does recombination refer to in terms of electrons?

Answer

Correct Answer: The process by which a conduction band electron gives up energy and falls into a valence band hole.

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30. What is a receiver?

Answer

Correct Answer: Unit or piece of equipment used to receive information.

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31. What is the power value in "volt amps" obtained from the product of source voltage and source current in a reactive circuit?

Answer

Correct Answer: Reactive power

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32. What is the other name of reactive power?

Answer

Correct Answer: Imaginary power

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33. What is the symbol for Reactance?

Answer

Correct Answer: X

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34. What does the symbol "X" represent?

Answer

Correct Answer: Reactance

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35. What is the time constant of an RC circuit?

Answer

Correct Answer: Product of resistance and capacitance in seconds

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36. What does the acronym "radar" stand for?

Answer

Correct Answer: Radio detection and ranging

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37. What is the acronym for "radio detection and ranging"?

Answer

Correct Answer: Radar

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38. What is a photo detector?

Answer

Correct Answer: A component used to detect or sense light

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39. What is the conductance of a material changed by?

Answer

Correct Answer: Electromagnetic radiation in the visible light spectrum

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40. What is the conductance of a material change by incident electromagnetic radiation in the visible light spectrum called?

Answer

Correct Answer: Photoconduction

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41. What is a photoconductive cell?

Answer

Correct Answer: A material whose resistance decreases or conductance increases when exposed to light.

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42. What is phosphor?

Answer

Correct Answer: A luminescent material that when bombarded with electrons will emit light of various colors.

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43. What is cathode ray tube?

Answer

Correct Answer: A tube that when bombarded with electrons will emit light of various colors.

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44. What does an oscillator that uses three RC networks in its feedback path produce?

Answer

Correct Answer: 180° phase shift

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45. What is the required phase shift for oscillation in a phase shift oscillator?

Answer

Correct Answer: 180°

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46. What does phase shift mean?

Answer

Correct Answer: Change in phase of a wave form between two points, expressed as degrees of lead or lag.

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47. What does phase shift represent?

Answer

Correct Answer: Change in phase of a wave form between two points

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48. What is phase angle?

Answer

Correct Answer: Phase difference between two or more waves, normally expressed in degrees.

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49. What is the Period?

Answer

Correct Answer: Time to complete one full cycle of a periodic or repeating waveform.

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50. What does "period" refer to in the context of a waveform?

Answer

Correct Answer: The time to complete one full cycle of a periodic or repeating waveform.

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51. What does "peak to peak" refer to in an AC waveform?

Answer

Correct Answer: The difference between the maximum positive and maximum negative values

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52. What does the term "peak to peak" refer to in regards to an AC waveform?

Answer

Correct Answer: Difference between the maximum positive and maximum negative values of an AC waveform.

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53. What is the full form of PIV?

Answer

Correct Answer: Peak inverse voltage

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54. What is a circuit having two or more paths for current flow called?

Answer

Correct Answer: Parallel

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55. What is a Parallel Circuit?

Answer

Correct Answer: A circuit having two or more paths for current flow.

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56. What is the condition that occurs when the load is greater than the system was designed to handle?

Answer

Correct Answer: Overload

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57. Overload occurs when the load is ____________ than the system was designed to handle.

Answer

Correct Answer: Greater

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58. Output power is measured in what units?

Answer

Correct Answer: Watts

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59. What is impedance measured across the output terminals of a device without a load connected called?

Answer

Correct Answer: Output impedance

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60. What does Output refer to in the context of electronics?

Answer

Correct Answer: Terminal at which a component, circuit or piece of equipment delivers current, voltage or power.

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61. What does Output refer to in relation to Terminal?

Answer

Correct Answer: The delivery of current, voltage or power

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62. What does an oscilloscope show?

Answer

Correct Answer: Signal amplitude, period and wave shape

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63. Oscilloscope shows _____.

Answer

Correct Answer: Signal amplitude, period, and wave shape

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64. What is an amplifier circuit having no means of comparing the output with the input called?

Answer

Correct Answer: Open loop mode

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65. What does open loop mode mean?

Answer

Correct Answer: An amplifier circuit having no means of comparing the output with the input.

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66. What is the gain of an amplifier when no feedback is present?

Answer

Correct Answer: Open loop gain

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67. What does op-amp stand for?

Answer

Correct Answer: Operational amplifier

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68. What is an operational amplifier?

Answer

Correct Answer: An electronic amplifier that can be used to amplify voltage or current

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69. What is the symbol for Ohm?

Answer

Correct Answer: W

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70. What is the unit of resistance symbolized by the Greek capital letter omega?

Answer

Correct Answer: Ohm

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71. What does "Normally open" mean?

Answer

Correct Answer: The contacts of a switch or relay are normally open or not connected.

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72. What is noise?

Answer

Correct Answer: Unwanted electromagnetic radiation within an electrical or mechanical system.

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73. What is a node?

Answer

Correct Answer: A junction or branch point in a circuit.

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74. What is a nickel-cadmium cell?

Answer

Correct Answer: A secondary cell that uses a nickel oxide positive electrode and a cadmium negative electrode.

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75. What is the electrical charge of a neutron?

Answer

Correct Answer: No electrical charge

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76. What is a "neutral wire"?

Answer

Correct Answer: A conductor that is intended to have a ground potential.

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77. Atoms with an equal number of protons and electrons are called what?

Answer

Correct Answer: Neutral atoms

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78. What is the definition of Neutral?

Answer

Correct Answer: A terminal, point or object with balanced charges. Neither positive or negative.

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79. What does the term 'network' refer to?

Answer

Correct Answer: Combination of interconnected components, circuits or systems.

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80. Modulation is the process by which an information signal is used to modify what?

Answer

Correct Answer: A higher frequency wave known as a carrier

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81. What is the process known as Modulation?

Answer

Correct Answer: The process by which an information signal is used to modify some characteristic of a higher frequency wave.

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82. What does a microphone do?

Answer

Correct Answer: Converts sound energy into electric energy.

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83. What is a mica capacitor?

Answer

Correct Answer: A capacitor using mica as the dielectric.

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84. What is the unit of length in the metric system?

Answer

Correct Answer: Meter

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85. A metal oxide resistor is a type of ____________.

Answer

Correct Answer: Metal Film Resistor

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86. What does MOSFET stand for?

Answer

Correct Answer: Metal oxide semiconductor field effect transistor

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87. A metal film resistor is a resistor in which a film of metal oxide or alloy is deposited on ________.

Answer

Correct Answer: An insulating substrate

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88. What is a primary cell?

Answer

Correct Answer: A cell that cannot be recharged and is thrown away after use.

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89. What is one maxwell unit equivalent to?

Answer

Correct Answer: One magnetic line of force.

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90. A small load impedance will result in what?

Answer

Correct Answer: A small load current

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91. What is the load impedance if the load is small?

Answer

Correct Answer: Large

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92. What is the load impedance?

Answer

Correct Answer: Vector sum of reactance and resistance in a load.

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93. What is Load current?

Answer

Correct Answer: Current drawn from a source by a load.

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94. What is a load?

Answer

Correct Answer: A component or piece of equipment that is connected to a source and draws current from a source.

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95. What is line regulation?

Answer

Correct Answer: The ability of a voltage regulator to maintain a constant voltage when the regulator input voltage varies.

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96. What is a linear scale?

Answer

Correct Answer: A scale in which the divisions are uniformly spaced.

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97. What is the relationship between input and output in a linear function?

Answer

Correct Answer: The output varies in direct proportion to the input.

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98. What is a limiter?

Answer

Correct Answer: Circuit or device that prevents some portion of its input from reaching the output.

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99. What is the full form of LED?

Answer

Correct Answer: Light-emitting diode

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100. What is the meaning of leakage?

Answer

Correct Answer: Small undesirable flow of current through an insulator or dielectric.

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101. What does a lead-acid cell consist of?

Answer

Correct Answer: Lead plates immersed in a sulphuric acid electrolyte

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102. What is the algebraic sum of the voltage drops in a closed path circuit?

Answer

Correct Answer: The algebraic sum of the source voltages applied

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103. The sum of the currents flowing into a point in a circuit is equal to which of the following?

Answer

Correct Answer: The sum of the currents flowing out of that same point

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104. What is the sum of the currents flowing into a point in a circuit?

Answer

Correct Answer: The sum of the currents flowing out of that same point.

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105. What is Kinetic Energy?

Answer

Correct Answer: Energy associated with motion.

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106. What measures the amount of electric power used by a customer?

Answer

Correct Answer: Kilowatt-hour meter

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107. What does kilowatt-hour measure?

Answer

Correct Answer: 1000 watts for 1 hour

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108. How many watts are in 1 kilowatt-hour?

Answer

Correct Answer: 1000 watts

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109. What is a Kilovolt-ampere?

Answer

Correct Answer: 1000 volts at 1 ampere

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110. What does "kilo" mean?

Answer

Correct Answer: Metric prefix for 1000.

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111. What is the metric prefix for 1000?

Answer

Correct Answer: Kilo

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112. What is a junction diode?

Answer

Correct Answer: A semiconductor diode in which the rectifying characteristics occur at a junction between the n-type and p-type semiconductor materials.

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