Two wires that are made up of two different materials whose specific resistances are in the ratio 2:3.length 3:4 and area 4:5 .The ratio of their resistances is :
1) 6:5
2) 6:8
3) 5:8
4)1:2

Two wires that are made up of two different materials whose specific resistance are in the ratio 2 : 3, length 3 : 4 and area 4 : 5. The ratio of their resistances is

The masses of the three wires of copper are in the ratio 5:3:1 and their lengths are in the ratio 1:3:5 . The ratio of their electrical resistances is

The masses of the three wires of copper are in the ratio 5:3:1 and their lengths are in the ratio 1:3:5 . The ratio of their electrical resistances is

The masses of three copper wires are in the ratio 2:3:5 and their lengths are in the ratio 5:3:2. Then, the ratio of their electrical resistance is

The massses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in th ratio 5 : 3 : 1. the ratio of their electrical resistance is

The massses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in th ratio 5 : 3 : 1. the ratio of their electrical resistance is

If the radii of two cyclinders are in the ratio 4: 3 and their heights are in the ratio 5: 6 find the ratio of their curved surface.

Masses of 3 wires of same metal are in the ratio 1 : 2 : 3 and their lengths are in the ratio 3 : 2 : 1. The electrical resistances are in ratio

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

The ratio of the thermal conductivities of two different materials is 1 : 2 . The thermal resistance of the rods of these materials having the same thickness are equal. Find the ratio of the length of rods.