Two rods of same material and length have their electric resistance in ratio `1 : 2`. When both rods are dipped in water, the correct statement will be

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

The radii of two rods of the same length and same material are in the ratio of 1:2. If these rods are twisted by applying the same torsional torque, then find the ratio of the angle of twist produced in the two rods.

The radii of two rods of the same length and same material are in the ratio of 1:2. If these rods are twisted by applying the same torsional torque, then find the ratio of the angle of twist produced in the two rods.

Two rods of same length have areas in the ratio 2: 1 and thermal conductivities in the ratio 3 : 4. The ratio of their thennal resistances will be