1.

Two metallic charged spheres whose radii are 20\[cm\] and 10\[cm\] respectively, have each 150\[micro-coulomb\] positive charge. The common potential after they are connected by a conducting wire is         [MP PMT 1991]

A.         \[9\times {{10}^{6}}\ volts\]
B.            \[4.5\times {{10}^{6}}\ volts\]
C.         \[1.8\times {{10}^{7}}\ volts\] 
D.            \[13.5\times {{10}^{6}}\ volts\]
Answer» B.            \[4.5\times {{10}^{6}}\ volts\]


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