A copper wire cannot be used as a fuse wire. Explain

A copper wire is stretched so as to increase its length by 0.2% . Calculate the percentage change in the resistance of the wire.

"To reduce power dissipation in the connecting wires between different power stations of hundreds miles long, wires current at enormous valve of V".Explain.

A copper wire has a diameter of 0.5 mm and a resistivity of 1.6×10^−6 ohm-m. How much of this wire would be necessary to make a resistance of 10 ohm?

A copper wire,3 mm in diameter, is wound about a cylinder whose length is 1.2 m, and diameter 10 cm, so as to cover the curved surface of the cylinder. Find the length and mass of the wire, assuming the density of copper to be 8.88g/(cm^3) .