Potential difference in series and parallel

[mr newtein]

why is potential difference same in parallel and gets divided in series,also what does it means this much pd is apllied by cell.pleaseeeeeee explain working of all this,i am getting frustrated as i am not able to understand

 

[berkeman]

why is potential difference same in parallel and gets divided in series,also what does it means this much pd is apllied by cell.pleaseeeeeee explain working of all this,i am getting frustrated as i am not able to understand

This introductory page should help:

http://en.wikipedia.org/wiki/Series_and_parallel_circuits

If you still have specific questions after reading that, post them here.