LECTURE7 Magnetostatic Field

55
Topic 7: Magnetostatic Field Electromagnetic Field Theory ENT222

description

Magnetostatic FieldEMT

Transcript of LECTURE7 Magnetostatic Field

Topic 7:Magnetostatic Field

Electromagnetic Field TheoryENT222

Coulomb’s Law

dz/dα=-ρ(1+cot2 α)cosec2 α-cot2 α=1

cosec2 A-cot2 A=1

z=a/tan θ=a cot θ

dz/dθ=-1-cot2 θ

constant along the path in circle

2Hob=kyb

Only ax because component z has been cancelled due to the existence of a pair of z-component in opposite direction.

Z-component has been cancelled.

HΦ is all the same along Amperian path. It implied that HΦ is constant in integration

*isolated means 2 different charge (or pole) can be splitted.

not conservative

ConservativeIt implies that B is constant.Therefore,

=

0