ASVAB Electronics Practice Test

These questions are part of the practice quiz. Start practicing

• Which transistor terminal is associated with the voltage output?
• Which instrument measures voltage in a circuit?
• What is the term for a single storage unit of chemical energy in a battery?
• Brown is __. (band code)
• Which term describes a point in a circuit that is at 0 volts with respect to the circuit's reference?
• Which switch completes a circuit only when it is in the closed (on) position?
• True or False: One hertz (Hz) equals one complete cycle per second.
• True or False: You can determine the number of cells in a battery by dividing the total voltage by the volts per cell.
• Transistors are small, require little power, and last a long time.
• Which materials are commonly used to make semiconductors?
• What is the process called that converts alternating current to direct current?
• In AC to DC conversion, what is the role of a diode?
• Which unit is used to measure electrical resistance?
• Which effect occurs when electric current passes through a muscle causing contraction and is used in medicine?
• A device that automatically interrupts the electrical current.
• Which unit is the standard for measuring frequency?
• What is the formula for impedance?
• What term describes a wire path that bypasses the rest of the circuit when two wires cross?
• What effect occurs when current passes through a chemical compound and breaks it apart, a process used in electroplating?
• What does a gold or silver band indicate on a resistor?
• A safety device that blows (melts) if the current exceeds a specified value.
• Which device would you use to convert a low-current signal into a higher-current drive for a speaker?
• True or False: Transistors are small, require little power, and last a long time.
• In resistor color coding, which statement is true?
• A semiconductor that controls the flow of electricity in a circuit. Usually made of germanium or silicon. This electrical device can amplify a signal.
• Most electricity comes in the form of ___.
• Which statement best describes Direct Current?
• Which term describes the flow of electrons?
• Which device is designed to be set and then left without further adjustment?
• A device that magnifies power, current, or voltage is called what?
• One kilowatt represents how many watts?
• Which resistor type is primarily used to adjust current in a circuit such as lamp brightness or motor speed?
• The rate at which electrical energy is consumed or transformed into another type of energy, such as light or heat.
• Which unit is used to measure electrical power?
• Which component is used to boost current in a circuit so a lamp can operate?
• Which switch allows current to flow only when the button is pressed?
• The statement 'Most electricity is measured in kilowatt-hours' is:
• If E = 24 V and R = 6 Ω, what is the current I?
• The flow (rate of flow) of electrons in a conductor is called what?
• Which expression represents the formula to solve for resistance in Ohm's law?
• Which component stores energy in an electric field and is commonly used in rectifier circuits?
• To calculate watt-hours, you multiply which two quantities?
• In the resistor color code, which digit corresponds to the color Blue?
• What is the SI unit used to quantify electric current?
• Which component is used to amplify small output current from a logic circuit to drive a high-current load?
• Sometimes a circuit must be opened in order to add or remove resistance.
• If a wire is wrapped around an iron core and current is passed, the iron becomes magnetized due to which effect?
• Which device is a switch that is operated by an electromagnet rather than by manual pressing?
• What is the name of a coil of wire that creates a magnetic field when current passes through it?
• Which item is used to show how connections are made between electronic components?
• Which term describes current that always flows in one direction?
• An instrument used for measuring electrical potential difference between two points in an electric circuit is called?
• Wires that are connected to each other and are indicated by a dark circle in diagrams are called?
• Wires are used to pass current from one part of the circuit to another.
• Push Switch is described as a switch that is activated by pressing the button. Which term matches this description?
• Which statement best describes the typical characteristics of transistors?
• 10 kilowatt-hours is enough energy to run a 1,000-watt waffle iron for how long?
• Which of the following is an example of an insulator?
• Which effect of current is primarily used in electroplating?
• Which diodes conduct current in the opposite direction after a threshold?
• The vacancies left by electrons moving from the positive terminal to the negative terminal describe which type of current?
• A storage compartment for electricity in a battery that has a specific voltage is called?
• A resistor has color bands red, yellow, and orange in that order. What is its resistance in ohms?
• True or False: To see what the voltage is anywhere in a circuit, you have to compare the voltage at that point to ground.
• Which capacitor is used most often in radio tuning circuits?
• Ohms are the unit used to measure which property?
• A watt-hour is a unit used to measure energy.
• The number of times a current completes 2 alternations of direction per second is called ___.
• Which description matches a Push Switch?
• Which device converts sound into electrical energy?
• In a transistor, which part is associated with the voltage output?
• How many watts are equal to one horsepower?
• What is the general term for the phenomena resulting from the presence and flow of electric current?
• True or False: You can figure out the number of cells a battery has by dividing the voltage of the battery by the volts.
• Which term describes a resistor that does not change its resistance?
• Which unit would measure the current in a circuit?
• A rheostat is a variable resistor with how many electrical connections?
• Which effect of current results in heating of a conductor due to its resistance?
• What is the unit of electrical power?
• An object that conducts electricity poorly at low temperatures.
• One milliampere is one-thousandth of an ampere.
• What is the term for the effect where a current in a wire in a magnetic field creates a magnetic field and can repel a magnet, enabling energy generation?
• Inductors are rated in ___.
• Which term describes current that changes direction in a regular pattern?
• Which color band represents the digit 2 in resistor color coding?
• What is the abbreviation for current?
• Red is __. (band code)
• One kilowatt-hour equals how many watt-hours?
• An example of a rheostat is a dimmer switch on a light.
• Resistors are rated in ohms and have a color code on them to indicate their value, tolerance, and sometimes quality.
• What is the unit of resistance?
• What is the abbreviation for resistance?
• Which description best defines a short circuit?
• Which unit is used to measure electric current?
• Which component stores electric charge?
• Which switch allows current to flow only when it's in the closed (on) position?
• Capacitors are rated in which unit?
• Which device measures the flow of current through a circuit?
• Which device can switch several circuit paths from a single coil activation?
• Higher voltages are easier to obtain with ___ current.
• Which statement is true about the first two bands on a resistor?
• What is the abbreviation for voltage?
• Any part of a circuit that measures 0 volts is called what?
• Which component stores energy in a magnetic field?
• 1 kilohertz (kHz) equals how many hertz (Hz)?
• A gold or silver band after the first bands indicates tolerance, and a quality band may follow the tolerance band.
• What numerical multiplier does the orange third band represent in resistor color codes?
• Which device provides inductive reactance in a circuit?
• This supplies electrical current.
• What shows how electronic components are connected together in schematic form?
• Which device converts electrical energy into sound?
• Which symbol denotes the unit of electrical resistance?
• In a resistor color code, which band position indicates the multiplier?
• Which term describes the rate at which electrical energy is consumed or transformed in a circuit?
• Which component stores energy in an electric field?
• Which expression represents the formula to solve for current in Ohm's law?
• Which device converts electrical energy to light for uses such as a dashboard warning light?
• Which transducer is used to produce audible signals such as alarms?
• Which component allows current to flow in only one direction? The arrow of the circuit symbol shows the direction in which the current can flow.
• Which lighting device is commonly used in automobile headlights to convert electrical energy to visible light?
• The unit of measurement for frequency is ___.
• Which transducer converts electrical energy to heat energy?
• Which device converts electrical energy into sound for playback?
• What is the name of the switch that directs current to one of two routes based on its position?
• The circuits that perform rectification
• Which digit is associated with the color Gray in the resistor color code?
• If I = 3 A and R = 2 Ω, what is the voltage E?
• Current can be expressed in terms of coulombs (C), which measure what quantity?
• Which device is designed to receive and/or transmit radio signals?
• Which three quantities are described as influencing current in a circuit according to Ohm's law?
• What digit does the color Violet represent in the resistor color code?
• The alternating current in typical household electricity completes 60 cycles per second. What is the frequency in Hz?
• Which device is designed to be set with a screwdriver and then left without further adjustment?
• Which term describes the flow of current in the conventional sense?
• What is the amount of electricity provided by a current of 1 ampere flowing for 1 second?
• Which statement is true about electron flow?
• Which device relies on electromagnetic induction to operate?
• The SI unit of electrical resistance is
• What process coats objects with a very thin coating of metal?
• Which expression represents the formula to solve for voltage in Ohm's law?
• Which device converts electrical energy into kinetic energy (motion)?
• Current flow can be expressed in terms of ___?
• The property of an AC circuit that resists any change in voltage due to energy storage in a capacitor is called what?
• Consists of two coils linked by an iron core; used to step up and step down AC voltages; energy transferred magnetically with no electrical connection between coils.
• Which unit is used to measure energy consumption over time in electrical circuits?
• Kilowatt-hours are a unit of what quantity?
• Which statement describes the function of the transistor base as a gate?
• Which transducer converts electrical energy to sound for listening?
• Which converts electrical energy to light for general illumination, such as a bulb?
• What is the unit for the amount of energy used in 1 hour at a rate of 1 watt?
• An open circuit contains what?
• 10 kilowatt-hours is enough energy to run a 5,000-watt air conditioner for how long?
• Which of the following is a type of switch designed to control a circuit from two locations?
• Which unit measures the current, defined as the number of electrons that move past a point in one second?
• A device that measures the amount of resistance that interferes with the flow.
• Which transducer converts sound energy into an electrical signal?
• Which term describes the production of electric current across a conductor moving through a magnetic field, underlying generators and transformers?
• This measures power, the rate at which electrical energy is consumed or transformed into energy such as light or heat.
• Which statement describes how a voltmeter is used?
• On a color-coded resistor, which two bands are used to form the first two significant digits of the resistance value?
• What is the SI unit for power?
• When the open gap in a circuit is closed to allow current to flow, this condition is called a
• Which device is commonly used to vary resistance without opening the circuit?
• Which statement about voltmeters is accurate?
• Rectifier circuits are commonly formed by components including diodes and capacitors; which device is the primary rectifying element?
• A device which can vary the resistance without opening the circuit.
• Which devices emit light when current passes through them?
• A connection to the earth.
• Store energy in an electric field and is used in timing circuits and filters?
• Which unit of measure corresponds to energy in electrical energy consumption?
• Which process coats objects with a very thin coating of metal?
• 1 megahertz (MHz) equals how many hertz (Hz)?
• The SI base unit for capacitance is the Farad. Which is the correct name for the unit of capacitance?
• What does Ohm's law state about the relationship between current, voltage, and resistance?
• Black is __. (band code)
• If E = 9 V and I = 3 A, what is the resistance R?
• What is the standard unit for measuring frequency?
• A device that converts energy from one form to another.
• A transistor contains how many terminals?
• Which device provides direct current and typically flows in one direction?
• Rectification helps appliances run at cooler temperatures and allows them to run at variable speeds.
• Which component restricts the flow of electric current?
• Rectification often requires ___ and ___.
• Which component stores energy in a magnetic field?
• Which type of switch is normally closed and opens when pressed?
• Which switch is commonly used to switch the main electricity because it can isolate both live and neutral connections?
• Which capacitor type is used for tuning in radio circuits?
• Which unit is larger: watt-hour or kilowatt-hour?
• Which instrument measures current in amperes when placed in series with a circuit?
• Which of the following is a transducer that converts electrical energy into light for general illumination?
• The statement 'If 1 coulomb flows past a point in 1 second, that is a flow rate of 1 ampere' is
• Which colors correspond to the digits 5 and 6, in that order?
• Which effect of current is associated with magnetizing nearby materials?
• Electricity follows the path of ___ resistance.
• A substance that conducts electricity and allows electrons to move freely.
• The production of electric current across a conductor moving through a magnetic field is called ___.
• Which term describes a diagram symbol that shows two wires are connected?
• If the voltage doubles while resistance remains constant, what happens to the current?
• Which device provides capacitive reactance in a circuit?
• Orange is __. (band code)
• Which devices are used in circuits to provide the type of reactance needed?
• Which color band represents the digit 3 in resistor color coding?
• How many kilowatt-hours are needed to run a 10,000-watt speaker system for 1 hour?
• These conduct electricity in only one direction.
• Which unit is used to measure electrical potential difference?
• The path of an electrical current is called a
• Which device provides alternating current, changing direction at a specific frequency?
• Yellow is __. (band code)
• Devices typically need ___ current to run properly.
• Which digit is associated with the color White in the resistor color code?
• Which quantity measures resistance?
• Which instrument would you use to measure resistance in a de-energized circuit?
• Which diode type is described as a specialized diode example?
• Wires that are not connected; crossing wires that are not connected are indicated by a hump symbol. What are they called?
• Which terminal is described as the voltage input in the transistor definitions?
• Which unit is used to measure the difference of potential between two points?
• What causes heat to be produced when current flows through a conductor?
• Found in rectifiers; a component made of a material with conductivity somewhere between that of a conductor and an insulator
• In the resistor color code, which digit corresponds to the color Green?
• Which variable resistor has three contacts and is used to adjust the output voltage?
• What term describes a circuit designed to magnify power, current, or voltage?
• How are kilowatt-hours determined?
• What term describes a resistor whose resistance can be adjusted to vary current flow?
• What are the two main types of capacitors mentioned?
• Which of the following is an example of a conductor?
• Which transducer converts electrical energy to mechanical energy?
• A material of such low conductivity that it does not easily allow current to pass.
• Which device converts electrical energy into heat?
• What device is an electrically operated switch that may operate multiple switches at one time, with a coil creating a magnetic field to move the contacts?
• 1 gigahertz (GHz) equals how many hertz (Hz)?
• What is the difference of potential between two points in a circuit commonly called?
• Block diagrams are used to show what?
• Which device converts electrical energy into sound for audible alerts?
• What is the energy used in 1 hour at a rate of 1,000 watts called?
• Which resistor type is used to adjust voltage?
• Which terminal is described as the voltage input in the transistor definitions?
• Electrical current occurs when electrons move from one place to another.