Conduction (1 Viewer)

[mystify]

'Compare the model 4 the conduction of electricity in metals at room temperature with the model 4 conduction of electricity in superconductors below the critical temp'


is someone able to plz explain this

TODAY IS THE TOMORROW THAT YOU WERE WORRIED ABOUT YESTERDAY..

 

[edd91]

At room temperature, there are atomic vibrations within the lattice which cause great amounts of collisions with the electron current, thus providing more resistance
At superconductors below the critical temp, there are no atomic vibrations thus no resistance

 

[gman03]

At room temperature: it is a curve..

At the critical temp: drop sharply to zero.

Below critical temp: zero.

 

[mystify]

thnx very much greatly appreciated

 

[krap]

i just wanted to add that during the collisions heat is released and since energy cannot be created from nothing - Law conservation of energy- the heat is from the kinetic energy of the electrons which is passed onto the cations when they collide. In superconductors due to the Messnier effect and BCS theory loss of energy does not occur.

And edd91, what did you mean by at room temp - there is a curve?

 

[Constip8edSkunk]

the curve one gets by graphing resistance against the temperature of conductor

 

[krap]

yeh, and what does the graph tell us about resistence of metals in room temps?

 

[Xayma]

That resistance=k*temperature² (by the shape of the curve)

 

[xiao1985]

That resistance=k*temperature² (by the shape of the curve)

are u sure it is squared???

not meant to be rude, but it can well be to the power of 3 or 4.... etc...

 

[Xayma]

Well I never said k was a constant I was going by the general shape.

 

[xiao1985]

meh, =D yea, the general shape looked close enough to resemble square relationship =)