Online resources for meanings and examples of radicals in simplified Chinese
I recommend mdbg.net's radical section. The first charachter on each individual radical's page is always the character the radical comes from followed by the radical itself (if they're different), followed by anywhere from a couple to several hundred charachters with that radical in simplified and traditional. Clicking on a charachter on any of the radical page takes you to the dictionary which shows the character in both simplified and traditional.

Hope this was helpful!