Question

a copper wire of length 1 m has resistivity 1.08ohm metre. if the wire is cut into two equal pieces that what will the resistivity of each piece

Answer 1

The resistivity of the wire will remain same as resistivity is the resistance of a wire at unit length and unit cross-sectional area at a fixed temperature. So regardless the length or cross sectional area, the resistivity of the wire will remain 1.08Ωm.