Dear Sangeeta,
From your ID I have assumed that you are an MBA student raising this question. However, I am not sure why you have raised this question.
Though Sunil"says there is no difference, there are considerable differences. The differences can be attributed to the purpose they cater for. They are also used to cater to different learning styles; the number of topics to be covered, the number of delgates or participants involved, etc.
Hence, kindly search the web using google where you will find links to websites such as
http://www.creativeartistryfx.com/di...vs_seminar.pdf
Have a nice day.
Simhan
A retired academic in the UK