Simple question,finding the charge on conducting sphere?

[faqoosy]

Simple question,finding the charge on conducting sphere??

A conducting sphere of radius 1cm has a charge of 5microC is placed far away from another sphere with radius 2cm,,the two spheres are connected to each other by a thin wire ,the charge on the larger sphere is ?

Answer : 3.33microC

this is a question from my past exam ,and tomorw is my final
i looked it up and tried thinking that the solution should be 2.5microC but its not ,,
can anyone tell me how we got that 3.33microC as an answer

 

[jedishrfu]

think in terms of the potential being the same for each conducting sphere since they're connected by a wire.

here's a website that might jog your memory:

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/potsph.html#c1