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Module9 - Coggle Diagram
Module9
Electromagnetic Wave
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direction
- E-field Characteristics: Periodic and parallel to the conductor.
- B-field Characteristics: Periodic and perpendicular to the conductor, generated by oscillating currents.
- transverse wave
- E and B fields are perpendicular to each other and to the direction of propagation.
- c=1/√(ϵ0μ0)=3 * 10^8
- λf=c
- Ey(t)=E0sin((2π/λ)x−2πft)
- Bz(t)=B0sin((2πλ)x−2πft)
density
- u=electric energy density+ magnetic energy density
=1/2 ϵ0E^2+1/(2 μ0) B^2=ϵ0E^2 =B^2/μ0
- E=cB
- E and B fields carry equal amounts of energy
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Maxwell’s Equations
- A stationary charge creates a static electric field.
- Isolated magnetic poles do not exist.
- Electric flux generates a magnetic field.
- A changing magnetic flux induces an electric field.