Question

It is said that superconductors have zero resistance,
therefore Potential Difference is also zero by the formula
V=I*R
If there is no p.d applied then how can current flow through a superconductor?

Answer 1

P.d is amount of work done in moving a unit positive from one point to other
P.d = I*R
So according to you p.d will be zero in superconductor as there is no Resistance ....... Well
"yes" p.d will be 0 as there is no work done in moving a positive charge ...... But electrons move freely and current is conducted




P.D can be 0 that does not prevent flow of current

Just like a man pushing a wall ,,,, or satellite revolving around earth.... In all such condition work done is 0 but
Some fiction has been performed


Really it's too. Difficult to understand.....