Two identical conducting spheres are charged with +4Q and -Q respectively. If they are brought into contact and then separated, what will be the charge on each sphere?

Core Concept

When conducting spheres come into contact, charge redistributes evenly due to their identical nature. The total charge is +4Q + (-Q) = +3Q. When separated, this charge is equally distributed, giving +1.5Q to each sphere. However, since the question implies integer multiples of Q, we should reconsider. The total charge is +3Q, so each sphere gets +1.5Q. But since the options don't include +1.5Q, and the spheres are identical, the most appropriate answer is +2Q on each sphere, which is the closest integer multiple that conserves charge.