Question

An iron wire has a cross-sectional area of 7.50 ✕ 10⁻⁶ m². Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire.

(a) How many kilograms are there in 1 mole of iron?
kg/mol

(b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter).
mol/m³

(c) Calculate the number density of iron atoms using Avogadro's number.
atoms/m³

(d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom.
electrons/m³

(e) If the wire carries a current of 14.0 A, calculate the drift speed of conduction electrons.
m/s

Answer 1