Electrodynamics (Symbols)¶
Symbols related to electrodynamics.
- admittance¶
Admittance is a measure of how easily a circuit or device will allow a current to flow, defined as the reciprocal of impedance.
- Symbol:
Y- Latex:
\(Y\)
- Dimension:
conductance
- electrical_conductance¶
Conductance is the ability of charge to flow in a certain path. It is the reciprocal of electrical resistance.
- Symbol:
G- Latex:
\(G\)
- Dimension:
conductance
- susceptance¶
Susceptance is the imaginary part of the electrical admittance.
- Symbol:
B- Latex:
\(B\)
- Dimension:
conductance
- electrical_impedance¶
Electrical impedance is the opposition to current presented by the combined effect of resistance and reactance in a circuit.
- Symbol:
Z- Latex:
\(Z\)
- Dimension:
impedance
- electromotive_force¶
Electromotive force, also electromotance, abbreviated emf, an energy transfer to an electric circuit per unit of electric charge, measured in volts.
- Symbol:
E- Latex:
\(\mathcal{E}\)
- Dimension:
voltage
- magnetic_flux¶
Magnetic flux through a surface is the surface integral of the normal component of the magnetic field \(\mathbf{B}\) over that surface.
- Symbol:
Phi_B- Latex:
\(\Phi_\mathbf{B}\)
- Dimension:
magnetic_flux
- absolute_permittivity¶
Absolute permittivity, or often sometimes permittivity, is a measure of the electric polarizability of a dielectric material.
- Symbol:
epsilon- Latex:
\(\varepsilon\)
- Dimension:
capacitance/length
- relative_permittivity¶
Relative permittivity is the permittivity of a medium relative to that of free space. Also see
vacuum_permittivity.- Symbol:
epsilon_r- Latex:
\(\varepsilon_{r}\)
- Dimension:
dimensionless
- absolute_permeability¶
Absolute permeability, also called permeability, is the measure of magnetization produced in a material in response to an applied magnetic field.
- Symbol:
mu- Latex:
\(\mu\)
- Dimension:
inductance/length
- relative_permeability¶
Relative permeability is the permeability of a medium relative to that of free space. Also see
vacuum_permeability.- Symbol:
mu_r- Latex:
\(\mu_{r}\)
- Dimension:
dimensionless
- capacitance¶
Capacitance is the capacity of a material object or device to store electric charge.
- Symbol:
C- Latex:
\(C\)
- Dimension:
capacitance
- charge¶
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. It can be positive or negative. Like charges repel each other and unlike charges attract each other.
- Symbol:
q- Latex:
\(q\)
- Dimension:
charge
- voltage¶
Voltage is the difference in electric potential between two points.
- Symbol:
V- Latex:
\(V\)
- Dimension:
voltage
- current¶
Current is a flow of charged particles moving through an electrical conductor or space.
- Symbol:
I- Latex:
\(I\)
- Dimension:
current
- electrical_resistance¶
Resistance is the measure of the degree to which a conductor opposes an electric current through that conductor. It is the real part of the complex-valued impedance.
- Symbol:
R- Latex:
\(R\)
- Dimension:
impedance
- electric_dipole_moment¶
Electric dipole moment is a measure of the separation of positive and negative electrical charges within a system: that is, a measure of the system’s overall polarity.
- Symbol:
p- Latex:
\(p\)
- Dimension:
charge*length
- electric_field_strength¶
Electric field strength refers to the magnitude of the electric field.
- Symbol:
E- Latex:
\(E\)
- Dimension:
voltage/length
- surface_charge_density¶
Surface charge density is charge per unit surface area.
- Symbol:
sigma- Latex:
\(\sigma\)
- Dimension:
charge/area
- electric_flux¶
Electric flux through a surface is the surface integral of the normal component of the electric field \(\mathbf{E}\) over that surface.
- Symbol:
Phi_E- Latex:
\(\Phi_\mathbf{E}\)
- Dimension:
length*voltage
- magnetic_flux_density¶
Magnetic flux density, also called magnetic induction, is a physical quantity that predicts the force on a charged particle in the Lorentz force law.
- Symbol:
B- Latex:
\(B\)
- Dimension:
magnetic_density
- electric_potential¶
Electric potential is defined as the amount of work or energy needed per unit of electric charge to move the charge from a reference point to a specific point in an electric field.
- Symbol:
U_E- Latex:
\(U_\mathbf{E}\)
- Dimension:
voltage
- power_factor¶
Power factor of an AC power system is defined as the ratio of the real power absorbed by the load to the apparent power flowing in the circuit.
- Symbol:
pf- Latex:
\(\mathrm{pf}\)
- Dimension:
dimensionless
- electrical_resistivity¶
Electrical resistivity is a fundamental specific property of a material that measures its electrical resistance or how strongly it resists electric current.
- Symbol:
rho- Latex:
\(\rho\)
- Dimension:
impedance*length
- inductance¶
Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it.
- Symbol:
L- Latex:
\(L\)
- Dimension:
inductance
- electric_time_constant¶
Time constant is the parameter characterizing the response to a step input of a first-order, linear time-invariant system. It is related to the speed of the response.
- Symbol:
tau- Latex:
\(\tau\)
- Dimension:
time
- electrical_reactance¶
Reactance is the opposition presented to alternating current by inductance and capacitance.
- Symbol:
X- Latex:
\(X\)
- Dimension:
impedance
- current_density¶
Current density is the amount of charge per unit time that flows through a unit area of a chosen cross section.
- Symbol:
j- Latex:
\(j\)
- Dimension:
current/area
- emissivity¶
The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation.
- Symbol:
epsilon- Latex:
\(\varepsilon\)
- Dimension:
dimensionless
- magnetic_moment¶
Magnetic (dipole) moment is a vector physical quantity representing the strength and the orientation of a system that exerts a magnetic field. The magnetic dipole moment of an object determines the magnitude of torque the object experiences in a given magnetic field.
Links:
- Symbol:
m- Latex:
\(m\)
- Dimension:
area*current
- electric_displacement¶
Electric displacement field, also called electric flux density or electric induction, is a vector field, which accounts for the electromagnetic effects of polarization and that of an electric field, combining the two in an auxiliary field.
Links:
- Symbol:
D- Latex:
\(D\)
- Dimension:
charge/area
- attenuation_coefficient¶
Attenuation coefficient characterizes how easily a volume of material can be penetrated by energy or matter.
Links:
- Symbol:
mu- Latex:
\(\mu\)
- Dimension:
1/length
- magnetic_field_strength¶
Magnetic field strength refers to magnitude of the magnetic field.
Links:
- Symbol:
H- Latex:
\(H\)
- Dimension:
current/length