Superconductors and resistance (1 Viewer)

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
Do superconductors really mean losless transmission, as there is absolutely ZERO resistance in wires?

Because in all answers i have read they say things like, "negligible resistance", and "virtually no resistance".

So can anyone clarify if superconductors have ZERO resistance, or is the resistance just really, really small.

Thanks in advance!
 

Mathsisfun15

Active Member
Joined
Apr 25, 2015
Messages
157
Gender
Male
HSC
2015
resistance implies collisions with the lattice. Due to the formation of cooper pairs electrons move through without collisions with the lattice
 

Drsoccerball

Well-Known Member
Joined
May 28, 2014
Messages
3,657
Gender
Undisclosed
HSC
2015
Impurities in wires could cause it to have resistance but we assume that there is no impurities and thus having 0 resistance.
 

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
thx guys. and Yeh that's what I thought. Was Just wondering if it was 'safe' to write zero resistance.
 

Drsoccerball

Well-Known Member
Joined
May 28, 2014
Messages
3,657
Gender
Undisclosed
HSC
2015
thx guys. and Yeh that's what I thought. Was Just wondering if it was 'safe' to write zero resistance.
Just write basically zero to be safe... Because you dont want to risk losing a mark...
 

PhysicsMaths

Active Member
Joined
Dec 9, 2014
Messages
179
Gender
Male
HSC
2015
thx guys. and Yeh that's what I thought. Was Just wondering if it was 'safe' to write zero resistance.
I'm pretty sure I saw a graph in one of the HSC past papers showing that electrical resistance dropped to 0 below the critical temperature of a superconductor, so that's what they want you to say.

The following was taken from an article on superconductivity published by USYD:
"The end result is that each electron in the solid is
attracted to every other electron forming a large network of interactions. Causing just one of these
electrons to collide and scatter from atoms in the lattice means the whole network of electrons must be
made to collide into the lattice, which is energetically too costly"

Doesn't exactly explain everything, but I guess it's a sound explanation
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top