A cylindrical copper rod has length L and resistance R. If it is melted and formed into another rod of length 2L, the resistance will be

A wire of length L is drawn to a length 2L, then its resistance will.

A cylindrical conductor of length l and uniform are of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section.

A cylindrical conductor of length l and uniform are of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section.

A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but half its length and half its radius will be:

A cylindrical conductor of length l and uniform area of cross-section A has resistance R . Another conductor of length 2 l and resistance R of the same material has area of cross-section :

A cylindrical conductor of length l and uniform area of cross-section A has resistance R . Another conductor of length 2 l and resistance R of the same material has area of cross-section :