The internal Resistance of pure inductor is:

Explanation

An inductor is a passive electrical component that stores energy in a magnetic field when electric current flows through it. In the ideal case, a pure inductor is considered to have zero internal resistance, meaning it does not impede the flow of current by resisting it. However, in practical scenarios, inductors may have some small resistance due to the material of the wire and other factors, but this is outside the scope of the ideal model discussed in this question. Thus, the internal resistance of a pure inductor is best described as zero. Other options, like infinite or finite, do not accurately reflect the characteristics of an ideal inductor.