Two metal spheres of radii ${R_1}$ and ${R_2}$ are charged to the same potential. The ratio of charges on the spheres is
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(b) Spheres have same potential
i.e. $k\frac{{{Q_1}}}{{{R_1}}} = k\frac{{{Q_2}}}{{{R_2}}}$ $==>$ $\frac{{{Q_1}}}{{{Q_2}}} = \frac{{{R_1}}}{{{R_2}}}$
i.e. $k\frac{{{Q_1}}}{{{R_1}}} = k\frac{{{Q_2}}}{{{R_2}}}$ $==>$ $\frac{{{Q_1}}}{{{Q_2}}} = \frac{{{R_1}}}{{{R_2}}}$
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