Two parallel plates separated by a distance of \[5mm\] are kept at a potential difference of \[50\,V.\] A particle of mass \[{{10}^{-15}}kg\] and charge \[{{10}^{-11}}C\] enters in it with a velocity \[{{10}^{7}}m/s.\] The acceleration of the particle will be [MP PMT 1997]

• A.            \[{{10}^{8}}m/{{s}^{2}}\]
• B.                                      \[5\times {{10}^{5}}m/{{s}^{2}}\]
• C.            \[{{10}^{5}}m/{{s}^{2}}\]
• D.                                      \[2\times {{10}^{3}}m/{{s}^{2}}\]