Two conductors are made of the same material and have the same length. Conductor `A` is a solid wire of diameter `1 mm`. Conductor `B` is a hollow tube of outer diameter `2 mm` and inner diameter `1mm`. Find the ratio of resistance `R_(A)` to `R_(B)`.

Two conductors are made of the same material and have the same length. Conductor A is a solid wire of radius 1.0 mm. Conductor B is a hollow tube of outside radius 2.2 mm and inside radius 1.0 mm. What is the resistance rate R_A//R_B measured between their ends?

Consider two conducting wires of same length and material, one wire is solid with radius r. The other is a hollow tube of outer radius 2r while inner r. The ratio of resistance of the two wires will be -

A copper sphere of diameter 18cm is drawn into a wire of diameter 4mm. Find the length of the wire.

A copper sphere of diameter 36 cm is drawn into a wire of diameter 4 mm. Find the length of the wire.

Two wires of same diameter of the same material having the length l and 2l If the force F is applied on each, the ratio of the work done in two wires will be

Two solid spheres are made of the same material. The ratio of their diameters is 2: 1. The ratio of their moments of inertia about their respective diameters is

Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B . The power delivered to the two conductors P_(A) and P_(B) respectively is such that P_(A)//P_(B) equals to

Two liquid drops have their diameters as 1 mm and 2 mm. The ratio of excess pressures in them is

If a sphere of diameter 8cm is melted and cast into a wire of diameter 3mm then find the length of wire in meter.