Read the given passage and answer the questions number that follow :
Weak electrolytes like acetic acid have lower degree of dissociation at higher concentrations and hence for such electrolytes, the change in `Lambda_(m)` with dilution is due to increase in the degree of dissociation and consequently the number of ions in total volume of solution that contains one mol of electrolyte. In such cases `Lambda_(m)` increases steeply on dilution, especially near lower concentrations. Therefore, `Lambda_(m)` cannot be obtained by extrapolation of `Lambda_(m)` to zero concentration. At infinite dilution (i.e., concentration c `to` zero) electrolyte dissociates completely (`alpha` = 1), but at such low concentration the conductivity of the solution is so low that it cannot be measured accurately. Therefore, `Lambda_(m)^(@)` for weak electrolytes is obtained by using Kohlrausch law of independence migration of ions.
Give the mathematical relation to calculate the degree of dissociation, `alpha` for a weak electrolyte.

Explanation

`alpha = Lambda_(m)/Lambda_(m)^(@)`