How does a capacitor works.. can anyone please explain it clearly...

 

The E-book here gives an excellent description.

Post back if you have questions.

 

Start reading here: http://www.allaboutcircuits.com/vol_1/chpt_13/1.html

 

Hello,

As the others recommended, the chapter in the eBook is good.

If you want to know more, there are a lot of pages on capacitors on this EDUCYPEDIA page:
http://www.educypedia.be/electronics/capacitors.htm

Here is an example of one of the links:
http://www.physics.sjsu.edu/becker/physics51/capacitors.htm

Bertus