Electromagnetism Exam

E

Electric Field Intensity

Unit: Volts per meter (V/m)

D

Electric Flux Density

Unit: Coulombs per sq. meter (C/m²)

V

Electric Potential

Unit: Volts (V)

ρ_v

Volume Charge Density

Unit: Coulombs per cubic meter (C/m³)

Q

Electric Charge

Unit: Coulombs (C)

H

Magnetic Field Intensity

Unit: Amperes per meter (A/m)

B

Magnetic Flux Density

Unit: Tesla (T) or Weber per sq. meter (Wb/m²)

A

Magnetic Vector Potential

Unit: Weber per meter (Wb/m)

J

Current Density

Unit: Amperes per sq. meter (A/m²)

Ψ

Magnetic Flux (psi)

Unit: Weber (Wb)

I

Current

Unit: Amperes (A)

ε₀ (in electrostatics)

Permittivity of Free Space (F/m)

ε₀ = 8.85 × 10^-12F/m (constant value)

ε_r (in electrostatics)

Relative Permittivity (F/m)

μ₀ (in electromagnetism)

Permeability of Free Space

μ₀ = 4π x 10^-7H/m (constant value)

μ_r (in electromagnetism)

Relative Permeability

σ

Conductivity (sigma)

Unit: Siemens per meter (S/m)

η

(eta) Refractive Index, Efficiency or Dimensionless (Ratio)

c

Speed of Light

c = 3 × 10⁸ m/s² (constant value)

ω

Angular Frequency (omega)

Unit: Radians per second (rad/s)

ϕ

Electrical Flux (phi)

Unit: volt-meter (V·m)

λ

Wavelength (lambda)

Unit: Meters (m)

β

Phase Constant (beta)

Unit: Radians per meter (rad/m)

α

Attenuation Constant

Unit: Nepers/meter (Np/m) or Decibels/meter (dB/m)

γ

Propagation Constant

Unit: dimensionless

Z₀

Characteristic Impedance

Unit: Ohms (Ω)

Z_in

Input Impedance

Unit: Ohms (Ω)

Γ

Reflection Coefficient

Unit: Dimensionless (Ratio)

s

Standing Wave Ratio (SWR)

Unit: Dimensionless (Ratio)

u

Phase Velocity

Unit: Meters per second (m/s)

R

Resistance per unit length

Unit: Ohms per meter (Ω/m)

L

Inductance per unit length

Unit: Henrys per meter (H/m)

G

Conductance per unit length

Unit: Siemens per meter (S/m)

C

Capacitance per unit length

Unit: Farads per meter (F/m)