How current can pass through a part of circuit if potential difference between two points is zero?

Question

Since the wire has no resistance there how can current flow in the circuit between points A and B? If current doesn't pass through them then the circuit doesn't have current

Answer 1

Unless otherwise indicated, in circuit diagrams the resistance of wires are assumed to be so low that they can be ignored (assumed zero) in the analysis. This is an idealization.

With the exception of superconductors all conductors have resistance. That said, for superconductors current can flow with zero potential difference. See also How can Ohm's law be correct if superconductors have 0 resistivity?

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