HVAC Electrical Midterm Exam
_____ are the particles that orbit the core of an atom
electrons
______ is the force that pushes free electrons through conductors
voltage
name 3 terms meaning voltage
electromotive force (emf) potential difference and eletrical pressure
a device used to generate electricity is called a
voltage source
name 6 voltage sources
battery, generator, solar cell, thermocouple, alternator, transformer secondary
is voltage current?
no
electric current is ________ flowing through a conductor
electrons
_______ is the measurement of current flow
amperage
amperage tells the _____ of electrons moving thru a conductor
amount
what device is used to check amperage?
ammeter
conductors provide a ____ for current
path
a circut with a complete path for current is said to have ________
continuity
do wires have continuity?
yes
_______ _______ reverses direction at regular intervals
alternating current
current alternates (reverses direction) two times every _____
cycle
ac in the usa flows at 60 cycles per _____ , which means the same as 60 _____
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, seconds, hertz
__________ is the opposition to current flow
resistance
resistance reduces the ______of electrons flowing thru a circuit
amount
amperage will be high through a circuit that has ___ resistance
low
name 2 types of resistance
resistive, reactive
counter e.m.f. is a type of _______ resistance
reactive
counter e.m.f. is produced by ________ in motion
magnetism
name 5 factors that affect the resistance of a device
material length girth temperature and magnetism in motion
the resistance of an open circuit will be _______ ohms
infinite
the resistance across a closed switch or wite should be ____ ohms
zero
all loads have __________
resistance
name 6 loads
lamp heater motor relay coul solenoid coul transformer primary
resistive loads generate ____ and or _____
heat , light
inductive loads generate ___________
electromagnetism
name 4 inducitve loads
motor relay coil solenoid coil transformer primary
ohms law states 1____ will push 1 ___ through 1 ___
volt, amp, ohm
ohms law formula is
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_____ are the particles that orbit the core of an atom
electrons
______ is the force that pushes free electrons through conductors
voltage
name 3 terms meaning voltage
electromotive force (emf) potential difference and eletrical pressure
a device used to generate electricity is called a
voltage source
name 6 voltage sources
battery, generator, solar cell, thermocouple, alternator, transformer secondary
is voltage current?
no
electric current is ________ flowing through a conductor
electrons
_______ is the measurement of current flow
amperage
amperage tells the _____ of electrons moving thru a conductor
amount
what device is used to check amperage?
ammeter
conductors provide a ____ for current
path
a circut with a complete path for current is said to have ________
continuity
do wires have continuity?
yes
_______ _______ reverses direction at regular intervals
alternating current
current alternates (reverses direction) two times every _____
cycle
ac in the usa flows at 60 cycles per _____ , which means the same as 60 _____
For any inquiries or more discounted documents email: Page 1 of 7
, seconds, hertz
__________ is the opposition to current flow
resistance
resistance reduces the ______of electrons flowing thru a circuit
amount
amperage will be high through a circuit that has ___ resistance
low
name 2 types of resistance
resistive, reactive
counter e.m.f. is a type of _______ resistance
reactive
counter e.m.f. is produced by ________ in motion
magnetism
name 5 factors that affect the resistance of a device
material length girth temperature and magnetism in motion
the resistance of an open circuit will be _______ ohms
infinite
the resistance across a closed switch or wite should be ____ ohms
zero
all loads have __________
resistance
name 6 loads
lamp heater motor relay coul solenoid coul transformer primary
resistive loads generate ____ and or _____
heat , light
inductive loads generate ___________
electromagnetism
name 4 inducitve loads
motor relay coil solenoid coil transformer primary
ohms law states 1____ will push 1 ___ through 1 ___
volt, amp, ohm
ohms law formula is
For any inquiries or more discounted documents email: Page 2 of 7
