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An iron wire has a cross-sectional area of 5.90 ✕ 10−6 m2. Carry out steps (a)...

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Physics

An iron wire has a cross-sectional area of 5.90 ✕10−6 m2. Carry out steps (a) through (e) tocompute the drift speed of the conduction electrons in thewire.

(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 percubic meter).
___________mol/m3

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

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

(e) If the wire carries a current of 38.0 A, calculate the driftspeed of conduction electrons.
___________ m/s

Answer & Explanation Solved by verified expert
4.3 Ratings (612 Votes)
a Since molar mass of iron Mfe 5585 gmmol also 1 gm 1103 kg So Mfe 55851103 kgmol Mfe 5585103 kgmol b Density of iron rhofe 786103 kgm3 So    See Answer
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