Question

A copper wire of mass 20 g carries a current of 6.023 A. What fraction of the total number of free electrons present in copper wire flows through the cross-section of the copper wire in 2 s ?
(gram atomic weight of copper = 63.5 g)

Answer 1

(i) Number of atoms (n) = mass of the substance `xx` number of atoms in one gram.
Number of electrons = n `xx` no. of electrons in each atom
`i=(Q)/(t)`
`q=n bar(e)`
(ii) ` (127)/(64xx10^(4))`