Sure, it can help with the page rank. If you got excellent content, you might find your article published on other blogs. Also think of the traffic that can be generated from page views if you include links to your site on the resource box as well as on the body of the article.
what to next just put the same blog article in ezinearticle.com you dont think its duplicating the content over internet? What to make username for this?
Yes... You can. The User name can be just like that of your real name. No need to include keyword in the user name.
Wont this create duplicate content? i thought this sort of thing was not a good idea? So your saying make a post on your blog then post the same thing to ezinearticles?
Just link that article in a way to your site . That the art of writing and attract visitors from articles to come to your websites.
I submit Some of my articles from my blog to ezines and hubpages at times. The good thing about ezines is that some people pick up my articles and therefore add backlinks to my site.