Two wires of different materials have resistances in the ratio `4 : 3`, lengths in the ratio `2 : 1` but have same radii of cross-section. Compare their resistivities.

Two wires of the same material have resistances in the ratio 16 : 81 and lengths in the ratio 1 : 4 . Compare their radii of cross-section.

Two wires made of same material have their electrical resistances in the ratio 1:4 if their lengths are in the ratio 1:2 , the ratio of their masses is

Two wires of same material , having cross-sectional areas in the ratio 1 : 2 and lengths in the ratio 1 : 4 are stretched by the same force. The ratio of the stresses in the wires will be ………….. .

Two wires made of same material have their length are in the ratio 1:2 and their masses in the ratio 3:16 . The ratio of resistance of two wires is

Two copper wires have their masses in the ratio 2 : 3 and the lengths in the ratio 3 : 4. The ratio of the resistances is

Two wires made of same material have lengths in the ratio 1:2 and their volumes in the same ratio. The ratio of their resistances is

Two wires A and B of same material have radii in the ratio 2:1 and lengths in the ratio 4:1 . The ratio of the normal forces required to produce the same change in the lengths of these two wires is

Two wires A and B of same material have radii in the ratio 2:1 and lengths in the ratio 4:1 . The ratio of the normal forces required to produce the same change in the lengths of these two wires is