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100 Cards in this Set
- Front
- Back
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What is the unit of electrical power?
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watt
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Which of the following is a two terminal device which permits current to flow in only one
direction? |
diode
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In 1911, Kammerlingh Onnes, a Dutch scientist, discovered what electrical device?
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superconductor
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What is a charge in motion referred to as?
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current
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What electrical item is calculated by the product of the resistance times the current squared
(R * I^2)? |
power
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An intrinsic conductor is also known as a(n) :
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semiconductor
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Which Italian scientist developed the battery?
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Alessandro Volta
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___________ charges are at rest.
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electrostatic
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DC and AC stand for :
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Direct Current and Alternating Current
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P-type semiconductors have an abundance of ___________ charge carriers.
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positive
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Who first discovered the relationship between electricity and magnetism by deflecting a
compass point with an electric current? |
Hans Christian Oersted
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What is a charged atom called?
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ion
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An alternator generates ______________ by rotating a loop of wire between the poles of a
permanent magnet. |
current
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In logic circuits, if one input is on and the other input is off, what is the result of an OR gate?
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on
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In 1948, the transistor was invented by :
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Bell Laboratories
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The ___________ is the metal strip in a DC motor that picks up the current.
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commutator
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What is the unit of measurement by which electric bills are calculated?
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kilowatt-hour
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The process of adding impurities to a crystal is :
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doping
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Which of the following scientists discovered electromagnetic induction?
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Michael Faraday
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When current goes through a wire, a(n) _____________ is created.
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magnetic field
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What is the storage of electric charge?
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capacitance
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Switching circuits or ______________ perform repetitive operations.
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digital integrated circuits
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Which of the following scientists discovered that lightning is a form of electricity?
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Benjamin Franklin
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What is a positively charged ion?
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cation
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What is the unit of capacitance?
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Farad
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Which of the following electrical components is responsible for the miniaturization of
electronic equipment? |
integrated circuits
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The time required for a capacitor to charge or discharge is dependent on the _____________
in the circuit. |
resistance
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What is the name for the positive electrode?
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anode
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A piece of wire designed to melt when current flowing through reaches a certain value is a(n) :
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fuse
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Amplifying and switching are two popular uses for what solid-state device?
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transistor
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What is the ability of a battery to deliver power over a given time?
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battery rating
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What removes unwanted frequency components of an electrical signal?
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capacitor
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From the schematic diagram shown, determine the current flow through resistor R2. Assume
the circuit is in steady state. |
2.5 mA
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The ____________ of a diode is the max current that the device can conduct for a partial cycle
of operation. |
peak rectified current
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_________________ is an electronic component capable of change from response in an
external signal. |
active device
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Metal conducts electricity better as it becomes :
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colder
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A(n) _______ coil produces high voltage from a low one.
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induction
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In logic gates, if one input is on and the other is off, what is the result of a NAND gate?
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on
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A(n) ______________ is a coil of wire wound around a core of magnetic material.
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electromagnet
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A quantitative measure of an electric charge is a(n) :
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coulombs
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Which of the following causes static electricity?
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friction
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What is the main part of an electrical amplifier?
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transistor
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An alternate path in a circuit is a(n) :
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shunt
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A(n) _____________ is a solution of acid and water.
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electrolyte
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When AC is converted to DC, it is said to be :
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rectified
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In logic circuits, if one input is on and the other input is off, what is the result of a NOR gate?
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off
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The property of a circuit that opposes a change in voltage in a circuit is :
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capacitance
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The production of electricity in a material through the application of pressure is said to be the
: |
piezo electric effect
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Which of the following laws states that the current in a parallel circuit is equal to the sum of
the current in its branches? |
Kirchoff's Current Law of Parallel Circuits
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Base, emitter, and collector are the three connections to a(n) :
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transistor
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Which of the following is a known shield against magnetism?
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no know shield exists
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Converting energy from one form to another is :
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transducing
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The basic instrument used to measure AC signal voltages and waves is the :
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oscilliscope
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What type of semiconductor has an abundance of electrons as carriers?
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n-type
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What law states that the voltage across all branches of a parallel circuit are equal?
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Kirchoff's Voltage Law
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A popular way to find an unknown resistance in a circuit is with a(n) :
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ohm meter
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The working voltage direct current is the voltage at which a(n) __________ can withstand
without destruction to the dielectric. |
capacitor
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What are the impurities added to semiconductors called?
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dopants
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Of the following wire sizes, which is the largest?
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6 awg
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A(n) ___________ is whenever electrons are allowed to return to the source without passing
through the complete circuit. |
short circuit
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What type of wave represents alternating current?
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sine wave
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What type of diode is purposely manufactured to operate in the reverse direction?
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zener
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A popular mathematical equation to solve for current, voltage, and resistance is :
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Ohm's law
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The _____________ of a conductor is influenced by material type, size, length, and
temperature. |
resistance
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Which of the following is a rotating machine which converts mechanical energy to electrical
energy? |
dynamo
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SSI, MSI, LSI, and VLSI are ways of classifying the component density of :
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integrated circuits
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What is the free movement of electrons in an electric field?
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conduction
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Low wattage resistors are generally labeled by a(n) :
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color codes
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From the schematic diagram shown, determine the voltage across resistor R1. Assume that
the circuit is in steady state. |
2.5 V
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The ________________ replaced the vacuum tube in electrical and electronic devices.
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transistor
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_____________ is the measure of resistance that relates purely to the properties of the
material. |
resistivity
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The ________________ is determined by the number of turns of wire, the current in the wire
coil, the core material, and the ratio of the coil diameter to the coil length. |
strength of an electromagnet
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____________ is equal to 6.24 x 10e18 electrons.
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1 Coulomb
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In diodes, _______________ is the maximum voltage that can be applied to the diode in the
reverse direction without destroying it. |
Peak Inverse Voltage
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What is an electrical switch that can be operated either magnetically or electrically?
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relay
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A relay is an example of a(n) _________ switch.
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magnetic
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When a person is shocked, the cause of the damage is the :
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electric current
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The reverse bias voltage at which the conduction suddenly increases in a diode is the :
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avalanche voltage
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Something in a circuit that uses electric current is a(n) :
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load
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______________ happens when two coils are close enough to each other that the magnetic
field of one cuts across the windings of the other coil. |
mutual induction
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Battery ratings are generally measured in :
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ampere-hours
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ROM that can be erased and programmed as needed is :
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EPROM
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What is the insulating medium between the parallel plates of a capacitor known as?
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dielectric
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What is a piece of metal used to carry away heat from an electronic component?
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heat sink
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The basis behind a transformer is :
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mutual induction
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Which of the following electronic terms is short for "transfer resistor"?
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transistor
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What device is used to store an electric charge on two plates parallel to each other?
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capacitor
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What is the rotating coil in a motor?
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armature
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Which of the following electrical devices are used for preventing excessive voltages or
currents from overloading circuits? |
fuses and circuit breakers
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In logic gates, if one input is on and the other is off, what is the result of an AND gate?
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off
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What part of a bell assembly causes the bell to ring when activated?
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electromagnet
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In a circuit, there is a load rated at 10 ohms and a battery rated at 5 amps connected in series.
What is the voltage in the circuit? |
50 V
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What is the typical frequency of AC electricity in the United States?
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60 Hz
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What is the negative electrode called?
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cathode
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Which of the following is a variable resistor?
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potentiometer
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___________________ states that current is the same for all points in a series circuit.
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Kirchoff's Current Law for Series Circuits
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The total resistance in a parallel circuit ___________ the value of any single resistor in the
circuit. |
is less than
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A dual in-line package switch is commonly called a(n) _________ switch.
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DIP
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What is a four part resistor circuit that can measure the resistance of an unknown resistor?
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wheatstone bridge
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_____________ is a negatively charged ion.
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anion
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