sir,
i want to know how to get steady ac supply from capacitor...i am thinking that it will be done by connecting inductor in series with capacitor...please clear my doubt.....and also give some additional information about this....

 

You can't get a steady AC output from a capacitor.

You can use it as a filter to improve the quality of the DC from a rectifier. If that is what you want to do, search "l section filter" and "pi section filter" for more information.