Two spherical conductors a and b of radii ra and rb ( ra> rb) are given equal amounts of charge. In which direction will the charge flow when these spheres are brought in contact. Give reason.

Electric potential on charged sphere:V=14πε0qrAs charges are equal on either spheres,VaVb=rbraAs ra > rb, it is clear that Vb > VaHence, the charge flows high potentital to low potential, that is, b to a.

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from sphere a to b because Q1/Q2=R1/R2
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