An electron is accelerated through a potential difference of 200 V . If e / m for the electron be 1.6 10¹¹ C / kg , the velocity acquired by the electron will be

Step-by-step solution

V=200 ~V , e m =1.6 10¹¹ C / kg Kinetic energy of electron = eV i.e, 1 2 m v^2=e V or v^2= 2 e m V aligned or v & = 2 e m V & = 2 1.6 10¹¹ 200 & =8 10^6 ~m / s aligned