Question

The current rating of a cable depends on ___________

(a) Length of the cable

(b) Diameter of the cable

(c) Both length and diameter of the cable

(d) Neither length nor diameter of the cable

This question was posed to me during an interview.

This is a very interesting question from Advanced Problems on Application of Laplace Transform topic in section Application of the Laplace Transform in Circuit Analysis of Network Theory

Answer 1

The correct choice is (b) Diameter of the cable

Explanation: We know that Current rating depends only on the area of cross-section. Since the area of cross section is a function of radius, which in turn is a function of diameter, so the current rating depends only on the Diameter of the cable.