NCATT (AET) 2025 COMPILED 365 QUESTIONS WITH
ACTUAL SOLUTIONS, GRADED A+
Ampere ( A, amp, amperage) Answer - • 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 Answer - • 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 Answer - • 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 Answer - • 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.
,• A conductor's resistance depends on such factors as cross sectional area,
length, temperature, and conductor material.
Coulomb Answer - • Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the 18th)
Current Answer - • The flow of electrons through a conductor is known as
current flow.
• The rate of current flow is measured in amperes.
Direct Current (DC) Answer - • 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 Answer - • 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) Answer - • 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 Answer - • Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
,Henry (H) Answer - • Basic unit of measurement for inductance of an electrical
coil
• 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 Answer - • Coil or other device used to introduce inductance into a
circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
Insulator Answer - • Material or device used to prevent the passage of heat,
electricity, or sound from one medium to another.
Left hand rule Answer - • Refers to electrical
• This rule is for determining the direction of movement of a current - carrying
conductor in a magnetic field
Magnetic Permeability Answer - • Measure of ease that lines of flux travel
through a material
Magnetism Answer - • 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 Answer - • Measurements relating or using the metric system
of measurement
, Neutron Answer - • Neutral subatomic particles that exist within the nucleus
of all atoms
• Neutrons are not involved in the conduction of electricity
Ohm Answer - • 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
Ohm's Law Answer - • 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 Answer - • Positively charged subatomic particles that exist within the
nucleus of all atoms
• Protons are not involved in the conduction of electricity
Resistance (R) Answer - • 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 Answer - • Short way of expressing a given number
between 1 and 10 multiplied by 10 to the appropriate power
ACTUAL SOLUTIONS, GRADED A+
Ampere ( A, amp, amperage) Answer - • 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 Answer - • 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 Answer - • 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 Answer - • 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.
,• A conductor's resistance depends on such factors as cross sectional area,
length, temperature, and conductor material.
Coulomb Answer - • Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the 18th)
Current Answer - • The flow of electrons through a conductor is known as
current flow.
• The rate of current flow is measured in amperes.
Direct Current (DC) Answer - • 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 Answer - • 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) Answer - • 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 Answer - • Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
,Henry (H) Answer - • Basic unit of measurement for inductance of an electrical
coil
• 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 Answer - • Coil or other device used to introduce inductance into a
circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
Insulator Answer - • Material or device used to prevent the passage of heat,
electricity, or sound from one medium to another.
Left hand rule Answer - • Refers to electrical
• This rule is for determining the direction of movement of a current - carrying
conductor in a magnetic field
Magnetic Permeability Answer - • Measure of ease that lines of flux travel
through a material
Magnetism Answer - • 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 Answer - • Measurements relating or using the metric system
of measurement
, Neutron Answer - • Neutral subatomic particles that exist within the nucleus
of all atoms
• Neutrons are not involved in the conduction of electricity
Ohm Answer - • 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
Ohm's Law Answer - • 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 Answer - • Positively charged subatomic particles that exist within the
nucleus of all atoms
• Protons are not involved in the conduction of electricity
Resistance (R) Answer - • 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 Answer - • Short way of expressing a given number
between 1 and 10 multiplied by 10 to the appropriate power
