1.

The electric potential at the surface of an atomic nucleus (Z = 50) of radius \[9.0\times ~{{10}^{-13}}cm\]is                              [CPMT 1990; Pb. PMT 2002; BVP 2003; MP PET 2004]

A.            80 volts
B.                                      \[8\times {{10}^{6}}\]volts
C.            9 volts                                     
D.            \[9\times {{10}^{5}}\]volts
Answer» C.            9 volts                                     


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