State faraday’s law second law of electrolysis.

Faraday’s second law: If the same quantity of electricity is passed through different electrolytic
cells that are connected in a series then masses of the different species discharged at different electrodes are directly proportional to their equivalent weights. It is mathematically
represented by
${\mathrm{m}}_1:{\mathrm{m}}_2:{\mathrm{m}}_3={\mathrm{E}}_1:{\mathrm{E}}_2:{\mathrm{E}}_3\text{ or }\frac{{\mathrm{m}}_1}{{\mathrm{E}}_1}=\frac{{\mathrm{m}}_2}{{\mathrm{E}}_2}=\frac{{\mathrm{m}}_3}{{\mathrm{E}}_3}$
where m = mass of the substance
E = equivalent weight of substance