A question about resistance

[spiralout]

Hi folks,

I'm no expert and I have no degree,
But I'm a curious little bastard,
With the patience of a tree,

I was pondering the matter of resistance,
Then a thought appeared one instance,
While I gazed upon the forest from a distance,

I was struggling to phrase it as it came,
They are illusive, hard to tame,
It might be childish but I'll ask it all the same. 

So, from the little that I know, resistance of any given wire,
is determined  by the material it is composed of and by it's diameter,
is that correct so far?

What would happen if  we create a wire that is non linear?

What I'm getting at is that the resistance of the wire
will remain constant as long as the wire retains the same diameter, right?
So, what happens to the resistance and the behavior of the current all together,
if  we have a wire that starts out very thin and gradually becomes thicker? 
For example, a 2 meter long copper wire that is 0.1mm at the beginning
and widens slowly to 3mm at the other end.

What would happen if electricity flows from thin to thick and vice verse?

I'll appreciate any thoughts and explanations,
But PLEASE, spare me from you're verbal violence,
And any other condemnations.

Thanks a lot,

Adam.

[Doug1]

You can work that test out yourself using extension cords to a power tool like a circular saw.

[jibbguy]

To R it would not matter,
That the wire were fatter....
It is not a tapered lead
That determines current feed...

Each Ohm could be an infinite set
.. Of small R's in series? You bet.

The circuit branch's total "R"
must be the deciding bar.

Z mixes in C and L too..
For this is the other shoe.
But the result's the same
when a resistor is the game.

The "water" current that flows
Is not set by the "river's" width
Nor by the banks' highs and lows.
It is set at the mouth to the sea,
and by little boys fishing who pee.

[Paul-R]

...and of course, the material affects the resistance. Silver best, copper good.
Also, the skin carries the bulk of the current.

Someone once asked how current could be brought to a halt half way down the
wire. If I rememeber right, he brought that thread to a halt. But there is something
interesting in these musings. I'm not sure exactly what.

[spiralout]

@ jib,

Do you mean there would be no effect what so ever?

Somehow it defies my inner logic. this question
came to my mind as I was thinking about fractals
and how everything in the natural world is pretty
much the same, no matter what scale you look at.
inverse scaling is the correct term, i believe.

Actually, I think I might have looked at it from the
wrong direction. I'm much more curios to know how
will the conductivity of this kind of wire would behave.
I'm thinking graphically here, but would it not focus
or disperse the current, depending where the power is coming from?

Thanks for your time,

Adam