Post on 05-Oct-2015
description
EE117 Discussion
2/27/15
EE117 Discussion (2/27/15) Homework 3 due Thursday, March 5th at 6PM Homework 2 QuesAons? Labs have started! Review Antenna Lab (#4)
Maxwells EquaAons Boundary CondiAons Fields from charge distribuAons
PracAce Problems QuesAons?
Vector and Scalar Quan::es in Electromagne:cs
Symbol Name Type
V, Voltage, PotenAal, EMF
Scalar
E Electric Field Vector
B MagneAc Field Vector
A Vector PotenAal Vector
D Divergence Scalar
V Gradient Vector
x A Curl Vector
Calcula:ng dX/d
Near X=0
Calcula:ng dX/d
Near X=0
R , X(1)
R , X(0)
Calcula:ng dX/d
Near X=0
R , X(1)
R , X(0)
Maxwells Equations
God said:
And there was light!
Boundary Conditions
Electric Field Due to Charge Distribu:ons
Field due to:
Electric Potential Due to Charges
In electric circuits, we usually select a convenient node that we call ground and assign it zero reference voltage. In free space and material media, we choose infinity as reference with V = 0. Hence, at a point P
For a point charge, V at range R is:
For continuous charge distributions:
Prac:ce Problem (4.27)
Prac:ce Problem (Ulaby 4.32)