Two metal spheres, one of radius R and t...

Two metal spheres, one of radius R and the other of radius 2 R respectively have the same surface charge density `sigma`. They are brought in contact and separated. What will be the new surface charge densities on them?

`sigma_1=5/3sigma,sigma_2=5/6sigma`

`sigma_1=5/6sigma,sigma_2=5/2sigma`

`sigma_1=5/2sigma,sigma_2=5/6sigma`

`sigma_1=5/2sigma,sigma_2=5/3sigma`

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