How is the Displacement Current Used to Resolve Issues with Ampere's Law?

[hhh79bigo]

Hi I was wondering if you can help me.

How is the concept of the displacement current used to resolve the ploblems with the application of Ampere's law.

I know that the modified ampere's law is

curl(B)=Mew(0)(jc+jd)

I just know how the displacement current jd is used to solve the ploblems with amperes law in the continuity equation

If anyone at all help me I would be greatful. It is a pass exam paper that I am revising, and is worth 6 marks.

thanks in advance

hhh79bigo

 

[lightgrav]

Ampere's Law is only valid for "static" currents.
If there's a time-dependance (charge build-up),
then its dE/dt also is surrounded by curling B.

Is this a "practical" application whee Ampere fails?

In a radio antenna, current up a wire accumulates
Q at the end; B is stronger at top due to dE/dt.

 

[Brad Barker]

by the way...

it's "mu," not "mew."

mu: the greek letter.

mew: the sound a cat makes.

 

[hhh79bigo]

To be honest with you that isn't much help at all really. Why post something if you don't know the answer?

A cat makes a meow sound by the way!

 

[Astronuc]

Perhaps some insight from

http://en.wikipedia.org/wiki/Displacement_current

http://en.wikipedia.org/wiki/Ampère's_law

http://en.wikipedia.org/wiki/Maxwell's_equations

The modified Ampere's law is one of Maxwell's equations.

 

[Brad Barker]

To be honest with you that isn't much help at all really. Why post something if you don't know the answer?

A cat makes a meow sound by the way!

alright, then.

mew: the 151st pokemon, from the original series.