What material is a conductor 1 m long with a cross section of 1 mm2 made of, if its resistance is 100 Ohm.

Conductor resistance:

R = ρ * l / S, where R is the resistance of the conductor (R = 100 Ohm), ρ is the specific resistance of the material from which the conductor was made, l is the length of the conductor (l = 1 m), S is the cross-sectional area of the conductor ( S = 1 mm2).

ρ = R * S / l = 100 * 1/1 = 100 Ohm * mm² / m.

A conductor cannot have a resistivity of 100 Ohm * mm² / m (maximum – graphite; ρ = 13 Ohm * mm² / m), therefore, such a conductor does not exist.