.......
Yah hor.
Wait....confused already. There's such a effect, where the metal
ions vibrate so much that it blocks the flow of the electrons. But
I cannot remember if this effect is more or less than the freeing
up of electrons when more energy is supplied to them.
And thermal equilibrium refers to the state where the
temperature between 2 substances match. If one does not have the
same as the other, heat will flow such that the temperature will be
the same.
The ions that vibrate too much thingy till it impedes the flow
of electrons is out of O level syllabus
Resistance do vary a little with temperature; higher temperature
leads to higher resistance because of extra noise. Usually, for
thicker wires, the effect is almost negligible. The effect is
especially apparent in very thin and small circuits, for e.g.
Integrated Circuits like DRAM cells => this is part of my job
scope -.-"
There have also been theories that if you cool down wires to
absolute zero temperature, you will get a super conductor.
But davidche, dun bother yourself with the details at the
moment.
