NCATT (AET) Exam 2025
Questions and Answers
Ampere ( A, amp, amperage) - ✔✔• Unit of measurement used to express the flow of
electrons (electrical current)
• One ampere is a rate of flow of one coulomb (6.28 billion - billion electrons) passing a
given point in an electrical circuit per second
• In mathematical problems amperage is expressed by the letter "I"
Battery - ✔✔• A device consisting of a number of primary voltaic cells (cells that cannot
be recharged) or secondary cells (cells that can be recharged) connected in series to
obtain a desired DC voltage
• A battery stores chemical energy and converts the energy into electrical form
• Aircraft storage batteries are generally rated at 12 or 24 volts
Capacitor - ✔✔• Electrical device used to store charge and energy in the form of an
electrostatic field
• A capacitor is a device made of two parallel conductors separated by an insulator
Conductor - ✔✔• Common building block of electrical circuits that easily permits the
movement of electrons from an electrical source to a load and back to the electrical
source with a minimum of resistance.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,• A conductor's resistance depends on such factors as cross sectional area, length,
temperature, and conductor material.
Coulomb - ✔✔• Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the 18th)
Current - ✔✔• The flow of electrons through a conductor is known as current flow.
• The rate of current flow is measured in amperes.
Direct Current (DC) - ✔✔• A flow of electrons in one direction throughout an electric
circuit with constant voltage and current.
• Direct current is caused by a constant difference of potential, both negative and
positive.
Electron - ✔✔• Negatively charged subatomic particles that are located and travel
around (orbit) the nucleus in an imaginary sphere or shell at the speed of light (186,000
miles/second)
• Electrons are involved in the conduction of electricity.
EMF (electromotive force) - ✔✔• The force that causes electrons to flow through a
conductor.
• This force is abbreviated e.m.f.
• The unit of measurement for eletromotive force is the volt.
• In mathematical problems voltage is expressed by the letter "E".
Farad - ✔✔• Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
Henry (H) - ✔✔• Basic unit of measurement for inductance of an electrical coil
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
,• One (1) henry is the inductance of a coil when a change of current of one (1) ampere
per second induces an e.m.f. of one (1) volt
• In mathematical problems inductance is expressed by the symbol "L".
Inductor - ✔✔• Coil or other device used to introduce inductance into a circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
Insulator - ✔✔• Material or device used to prevent the passage of heat, electricity, or
sound from one medium to another.
Left hand rule - ✔✔• Refers to electrical
• This rule is for determining the direction of movement of a current - carrying
conductor in a magnetic field
Magnetic Permeability - ✔✔• Measure of ease that lines of flux travel through a
material
Magnetism - ✔✔• Ability of a magnet to attract certain materials containing iron and to
influence electrons
• Magnetism is the principle way to effectively produce AC electricity
Metric Prefixes - ✔✔• Measurements relating or using the metric system of
measurement
Neutron - ✔✔• Neutral subatomic particles that exist within the nucleus of all atoms
• Neutrons are not involved in the conduction of electricity
Ohm - ✔✔• Unit of electrical opposition to the flow of current
• A circuit has one ohm of resistance when it limits the flow of current to one amp
under a voltage pressure of one volt
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
, Ohm's Law - ✔✔• Ohm's Law states "the amount of current flowing in a circuit is
directly proportional to the circuit voltage and inversely proportional to the circuit
resistance"
• A plain language statement for Ohm's Law is; One volt causes one ampere to flow
through a resistance of one ohm.
Proton - ✔✔• Positively charged subatomic particles that exist within the nucleus of all
atoms
• Protons are not involved in the conduction of electricity
Resistance (R) - ✔✔• Electrical characteristic of a conductor
• Opposition that a circuit, component, or substance presents to flow of electricity
• Resistance is the force that opposes or slows down another force, drops voltage, and
consumes power
• Resistance is measured in ohms
• In mathematical problems ohms of resistance is expressed by symbol "R"
Scientific Notation - ✔✔• Short way of expressing a given number between 1 and 10
multiplied by 10 to the appropriate power
Static Electricity - ✔✔• Electrical charge that may be built up on a non-conductive
surface by friction
• Static electricity serves no useful purpose
Volt (V) - ✔✔• Basic unit of electrical pressure
• A volt is the amount of force required to cause one amp of current to flow through
one ohm or resistance
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 4
Questions and Answers
Ampere ( A, amp, amperage) - ✔✔• Unit of measurement used to express the flow of
electrons (electrical current)
• One ampere is a rate of flow of one coulomb (6.28 billion - billion electrons) passing a
given point in an electrical circuit per second
• In mathematical problems amperage is expressed by the letter "I"
Battery - ✔✔• A device consisting of a number of primary voltaic cells (cells that cannot
be recharged) or secondary cells (cells that can be recharged) connected in series to
obtain a desired DC voltage
• A battery stores chemical energy and converts the energy into electrical form
• Aircraft storage batteries are generally rated at 12 or 24 volts
Capacitor - ✔✔• Electrical device used to store charge and energy in the form of an
electrostatic field
• A capacitor is a device made of two parallel conductors separated by an insulator
Conductor - ✔✔• Common building block of electrical circuits that easily permits the
movement of electrons from an electrical source to a load and back to the electrical
source with a minimum of resistance.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,• A conductor's resistance depends on such factors as cross sectional area, length,
temperature, and conductor material.
Coulomb - ✔✔• Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the 18th)
Current - ✔✔• The flow of electrons through a conductor is known as current flow.
• The rate of current flow is measured in amperes.
Direct Current (DC) - ✔✔• A flow of electrons in one direction throughout an electric
circuit with constant voltage and current.
• Direct current is caused by a constant difference of potential, both negative and
positive.
Electron - ✔✔• Negatively charged subatomic particles that are located and travel
around (orbit) the nucleus in an imaginary sphere or shell at the speed of light (186,000
miles/second)
• Electrons are involved in the conduction of electricity.
EMF (electromotive force) - ✔✔• The force that causes electrons to flow through a
conductor.
• This force is abbreviated e.m.f.
• The unit of measurement for eletromotive force is the volt.
• In mathematical problems voltage is expressed by the letter "E".
Farad - ✔✔• Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
Henry (H) - ✔✔• Basic unit of measurement for inductance of an electrical coil
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
,• One (1) henry is the inductance of a coil when a change of current of one (1) ampere
per second induces an e.m.f. of one (1) volt
• In mathematical problems inductance is expressed by the symbol "L".
Inductor - ✔✔• Coil or other device used to introduce inductance into a circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
Insulator - ✔✔• Material or device used to prevent the passage of heat, electricity, or
sound from one medium to another.
Left hand rule - ✔✔• Refers to electrical
• This rule is for determining the direction of movement of a current - carrying
conductor in a magnetic field
Magnetic Permeability - ✔✔• Measure of ease that lines of flux travel through a
material
Magnetism - ✔✔• Ability of a magnet to attract certain materials containing iron and to
influence electrons
• Magnetism is the principle way to effectively produce AC electricity
Metric Prefixes - ✔✔• Measurements relating or using the metric system of
measurement
Neutron - ✔✔• Neutral subatomic particles that exist within the nucleus of all atoms
• Neutrons are not involved in the conduction of electricity
Ohm - ✔✔• Unit of electrical opposition to the flow of current
• A circuit has one ohm of resistance when it limits the flow of current to one amp
under a voltage pressure of one volt
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
, Ohm's Law - ✔✔• Ohm's Law states "the amount of current flowing in a circuit is
directly proportional to the circuit voltage and inversely proportional to the circuit
resistance"
• A plain language statement for Ohm's Law is; One volt causes one ampere to flow
through a resistance of one ohm.
Proton - ✔✔• Positively charged subatomic particles that exist within the nucleus of all
atoms
• Protons are not involved in the conduction of electricity
Resistance (R) - ✔✔• Electrical characteristic of a conductor
• Opposition that a circuit, component, or substance presents to flow of electricity
• Resistance is the force that opposes or slows down another force, drops voltage, and
consumes power
• Resistance is measured in ohms
• In mathematical problems ohms of resistance is expressed by symbol "R"
Scientific Notation - ✔✔• Short way of expressing a given number between 1 and 10
multiplied by 10 to the appropriate power
Static Electricity - ✔✔• Electrical charge that may be built up on a non-conductive
surface by friction
• Static electricity serves no useful purpose
Volt (V) - ✔✔• Basic unit of electrical pressure
• A volt is the amount of force required to cause one amp of current to flow through
one ohm or resistance
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 4
