question_answer

A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity 20000 V/m. If mass of the particle is \[9.6\times {{10}^{-16}}\,kg\], the charge on it and excess number of electrons on the particle are respectively \[(g=10\,m/{{s}^{2}})\]                                                                                   [Pb. PMT 2003]

A)                    \[4.8\times {{10}^{-19}}C,\,3\]

B)                                      \[5.8\times {{10}^{-19}}C,\,4\]

C)                    \[3.8\times {{10}^{-19}}C,\,2\]

D)                    \[2.8\times {{10}^{-19}}C,\,1\]