Find the radius of the wire of length 25 m needed to prepare a coil of resistance `25 Omega`. The resistivity of the material of the wire is `3.14 xx10^-7`Ω−m .

Calculate the length of a wire of radius 0.5 mm needed to prepare a coil of resistance 40 Omega . The resistivity of the material of the wire is 3.14 times 10^(-7) Omega-m .

Calculate the length of a wire of diameter 1 mm needed to prepare a coil of resistance 25 ohm. The resistivity of the material of the wire is 3.14 times 10^(-7) Omega.m .

The resistance of a wire of length 31.4 m and diameter 1 mm is 20 Omega . Find the resistivity of the material of the wire.

The resistance of a wire of length 15.7 m and radius 0.5 mm is 10 Omega . Find the resistivity of the material of the wire.

A wire has length 10 m and resistance 20 Omega If the resistivity of the material of the wire is 6 times 10^(-7) Omega.m , find the area of cross section of the wire.

The length of a conducting wire is 50 cm and its radius is 0.5 mm. If its resistance is 30 Omega what is the resistivity of its material?

The length of a conducting wire is 50 cm and its radius is 0.5 mm. If its resistance is 40 Omega what is the resistivity of its material?

A 6m long wire has diameter 0.5 mm. Its resistance is 50 Omega . Find the resistivity and conductivity.

A cell of e.m.f. 2 volt and negligible internal resistance is connected to potentiometer wire of length 4 m and resistance 25 Omega , to form a closed circuit. Find the potential gradient along the wire .