Question

current without potential. how it's possible.​

Answer 1

Explanation:

In a superconducting circuit -i.e. the magnet of a MRI machine- the current flows without a potential difference. ... Thus if I have a 9 V potential diff across the terminals and 3ohm resistance will the potential difference change if I change resistance.

Answer 2

HERE IS UR ANSWER DEAR

"Potential difference", or more accurately EMF, aka Voltage, is that pressure that drives current around a circuit. In a superconducting circuit -i.e. the magnet of a MRI machine- the current flows without a potential difference. A potential difference ist only necessary if there is a resistance to overcome.