Question

What does infinite resistance mean in circuit.

Ideally we have zero resistance does that mean that if I apply an potential difference V, it will come to zero (because of ohm law)

V=IR

BUT R=0

V=0

Answer 1

The infinite resistance practically means the open circuit. Theoretically, we can represent the infinite resistance, but practically it is not possible. So a good thing is to keep the circuit open.
In the case where there is no resistance, current (once flowing) does not require any voltage to continue flowing. If you start a current flowing in a superconductor, then even with no applied voltage, it continues to flow.