Two wires of same material and same length have radii `r_1 and r_2` respectively. Compare their resistances.

Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare : their resistances,

Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare : their specific resistance.

Two wires of same material have length L and L/2 and radius r and r/2 respectively. The ratio of their Young's modulus is

Two copper wires A and B of length 30 m and 10 m have radii 2 cm and 1 cm respectively. Compare the resistances of the two wires. Which will have less resistance ?

Two wires of same material and length have the radii of their cross sections as r and 2r, respectively. The ratio of their resistances

Two wires of same material and length have resistance 5 Omega and 10 Omega respectively. Find the ratio of radii of the two wires.