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ECE 3342 Electromagnetic Theory II. Section 1.1 Electric and Magnetic Fields. The Electric Field. is the Electric Field Intensity measured in Volts per meter (V/m). The Electric Field. + . The Force on a Charge. Unit Vector in the direction of . −. Charge (C) Electric Field (V/m)
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ECE 3342Electromagnetic Theory II Section 1.1 Electric and Magnetic Fields
The Electric Field is the Electric Field Intensity measured in Volts per meter (V/m).
The Force on a Charge Unit Vector in the direction of − Charge (C) Electric Field (V/m) Direction of the force
The Force on a Charge + Charge (C) Electric Field (V/m) Direction of the force
The Magnetic Field is the Magnetic Field Intensity measured in Amps per meter (A/m).
The Force on a Moving Charge + Velocity of the particle. (N) Magnetic Permeability Cross-Product
Rectangular Coordinates Clockwise “+” Anti-Clockwise “−”
Cross Product + + +
Electric Flux Density The Density of the lines of Electric Flux is Measured in Coulombs/ m2 (C/m2) is the Electrical Permittivity of the medium. = Relative Permittivity of the medium (aka the dielectric constant) = The Permittivity of free space.
Electrical Permittivity Farads per meter (F/M) Air: Glass: Mica: Plexiglass®:
Magnetic Flux Density The Density of the line of Magnetic Flus is: Measured in Webers per square meter (Wb/m2) is the Magnetic Permeability of the medium. = The Relative Permeability of the medium. = The Permeability of Free Space.
Magnetic Permeability Henries per meter (H/M) Air: Machine Steel: Iron:
Conductivity Electric Field Intensity (V/m) Conductivity (Siemens/m, mhos/meter, Ω-1m-1) Current Density (Amps/ square meter, A/m2)
Conductivity Free Space: Air: Copper: (Ω-1m-1) Mica: (Ω-1m-1) Silicon: (Ω-1m-1)