Question

A metallic wire of density 6.07g/cm³ , and grammolecular weight 63.2g/mole , has a diameter of 4.56mm . It has 1free electron per atom.

A) What is the density of free electrons in the metal?

n= ? e-/m³

B) What is the current in the metal wire if the drift velocity is7.56×10^-5 m/s , and the diameter of the wire is 4.56mm?

i= ? A

C) What is the resistance in the wire if the potential differenceis 3V ?

R= ? Ω

D) What is the length of this piece of wire if its resistivity is2.7×10^-5 Ωm ?

L= ? m