Question

two conductor a and b of same length and material of cross section area less than restinace 1​

Answer 1

Answer:

Resistance = (resistivity).l/A, where area of the conductor cross section is A and the length is l

so the ratio of resistances will be inversely proportional to the Areas. by cross section if you mean the area of the cross section, then Bwill be half of A or 15 ohms. If you mean a diameter or thickness of the conductor as the area, then the resistance of B will be 1/4 (or square of 1/2), i.e 30/4=7.5 ohms

Explanation: