The degree of ionization of a compound depends on

In a weak electrolytic solution,the degree of ionization:

The degree of dissociation in a weak electrolyte increases

The electric conduction of a salt solution in water depends on the

Dissociation constant and degree of dissociation of a weak acid are $1.8 \times 10^{-5}$ and $0.03$ respectively. What will be the concentration of the solution of the weak acid (in $M$)?

If $\alpha$ is the degree of ionization,$C$ is the concentration of a weak electrolyte,and $K_a$ is the acid ionization constant,then the correct relationship between $\alpha$,$C$,and $K_a$ is: