Electromagnetic Dimensions & Units Flashcards
Based on Section 12: Power Amplifiers of the Yamaha Sound Reinforcement Handbook
This unit measures what dimension of electromagnetism?
amperes or “amp”
symbol: A
current
Commonly represented by “I”
This unit measures what dimension of electromagnetism?
ohms
symbol: Ω
impedance and resistance
Commonly represented by “Z” and “R” respectively
This unit measures what dimension of electromagnetism?
volts
symbol: V
voltage
(electrical potential difference)
Commonly represented by “E”
This unit measures what dimension of electromagnetism?
watts
symbol: W
power
Commonly represented by “P” or “W”
This unit measures what dimension of electromagnetism?
farad
symbol: F
capacitance
Commonly represented by “C”
This unit measures what dimension of electromagnetism?
henry
symbol: H
inductance
Commonly represented by “L”
Name the dimension of electromagnetism.
I
current
stream of electrons that flows from point of highest to lowest potential
Measured in amperes, “amp”
Name the dimension of electromagnetism.
R
resistance
opposition to flow of DC current
Measured in ohms, “Ω”
Name the dimension of electromagnetism.
Z
impedence
opposition to the flow of AC current
Measured in ohms, “Ω”
Name the dimension of electromagnetism.
E
voltage
difference in electrical potential between two points
Measured in volts, “V”
Name the dimension of electromagnetism.
W
power
energy used to do the work of passing thru a load resistance/impedence
Measured in watts, “W”
Name the dimension of electromagnetism.
P
power
energy used to do the work of passing thru a load resistance/impedence
Measured in watts, “W”
Name the dimension of electromagnetism.
C
capacitance
capability of storing electrical charge
Measured in farads, “F”
Name the dimension of electromagnetism.
L
inductance
a conductor’s opposition to a change in the current flowing through it
Measured in henrys, “H”
Define the dimension of electromagnetism.
current
Commonly represented by “I”
the # of electrons that passes a certain point, flowing from the point of highest potential to the point of lowest potential
Measured in amperes or “amps”, “A”
Define the dimension of electromagnetism.
resistance
Commonly represented by “R”
opposition to flow of direct current
Measured in ohms, “Ω”
Define the dimension of electromagnetism.
impedance
Commonly represented by “Z”
opposition to flow of alternating current (resistance + reactance)
Measured in ohms, “Ω”
Read more about reactance here
Define the dimension of electromagnetism.
voltage
Commonly represented by “E”
difference in electrical potential between two points
Measured in volts, “V”
Define the dimension of electromagnetism.
power
Commonly represented by “P” or “W”
the energy used to do the work of flowing through a load resistance/impedence
Measured in watts, “W”
Define the dimension of electromagnetism.
capacitance
Commonly represented by “C”
capability to store electrical charge
Measured in farads, “F”
Define the dimension of electromagnetism.
inductance
Commonly represented by “L”
a conductor’s opposition to a change in the current flowing through it
Measured in henrys, “H”
