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)