Two wire, one of copper and other of iron, are of the same length and same radius. Which will have more resistance?

Two wires of equal length, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two wires of equal length, one of copper and the other of manganin have the same resistance .Which wire is thicker ?

Two identical loops, one of copper and the other of aluminium are rotated with the same angular speed in the same magnetic field, compare the induced emf

Two identical loops, one of copper and the other of aluminium are rotated with the same angular speed in the same magnetic field, compare current produced in the two coils. Justify your answer.

Two balls of the same mass, one of iron and the other of copper, are dropped from the same height. Which one would become hotter?

Two wires of equal length, one of aluminium and the other of copper, have the same resistance. Which of the two wires is lighter ? Hence, explain why aluminium wires are preferred for overhead power cables. (rho _(Al)=2.63xx10^(-8)Omega -m ,P_(Cu)=1.72xx10^(-8)Omega -m , relative density of Al=2.7,of cu =8.9)