Is there a way to get a back link from Wikipedia?

Add Authentic information at Wikipedia and after successful verification,your post gets approval.

Yes, if you can post wikipedia entries to your social media profiles like twitter, facebook and others.

yes, you can get a backlink from wikipedia in resource section. Add appropriate information, it will acceptable.

Yes, there is a way called broken link building. you can check the wiki page and suggest the broken link with the new link related to that

#If you are planning to take backlink from Wikipedia how much hard work you have to do think!

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Yes, You can get a quality back link from Wikipedia.

yes. your site should have some extra valuable information.

I think Pratik is right

Yes, you can get, But if you are linking genuine informative page.