An electron moving with the speed \[5\times {{10}^{6}}\] per sec is shooted parallel to the electric field of intensity \[1\times {{10}^{3}}N/C\]. Field is responsible for the retardation of motion of electron. Now evaluate the distance travelled by the electron before coming to rest for an instant (mass of \[e=9\times {{10}^{-31}}Kg.\] charge \[=1.6\times {{10}^{-19}}C)\] [MP PMT 2003]

• A.            7 m                                           
• B.            0.7 mm
• C.            7 cm
• D.            0.7 cm