let's say i have 2 pages in my website that talks about the same topic. however, one comes with PR 0 and another with PR 2. Does the clicks from PR2 earns more?
Not related to adsense but normally if you have a PR2 then that page has a better content and some sites linking to it. Can bring more traffic and more clicks if that is what you are saying off.
This is self explanotory and quite obvious. Adsense earnings are not based around PageRank. You will need to get more traffic for more clicks, yes in general. However if you have a low traffic site, but also the right niche and adverts which match that niche, you will generally recieve more high paying clicks on a lower scale leading to more profits than on a popular site with adverts that are not relevant to the content of your site.
Well... it doesn't affect how much you're earning per click.. but usually the higher PR you have, the more traffic you have, and the more clicks you'll get?
No, it won't. The quality of your site content would affect your Adsense earnings. Adwords advertisers would start blocking crappy websites.
Though if you've managed to get relevant ads on the high-paying "niche" site, then you have a good chance of having the know-how to get relevant ads on the lower-paying one. Then it becomes a question of volume. In most cases I'd rather have a consistent number of lower-paying clicks than a fickle-amount of higher paying ones.
No, there is no relation between pagerank and google adsense earning per click. But some intangible things may earn more in good page rank page. 1) Good page rank will come up in google search engines so you will get more traffic then lesser page rank page. 2) Some publisher may directly display CPM based ads on your site which has good page rank. Etc.
Site? Does a site get pagerank that is different than the rank of the homepage of the site? I thought pagerank was just that, the rank of a page. Yet pages with pagerank of 0 do appear in the indices, they just may not appear as high.
Page Rank does not affect adsense earnings directly, but with a higher page rank you are likely getting more traffic than a lower page rank site (not always the case, but a good indication none the less) so that may in fact help your earnings.