An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final velocity will be-
A. \(\sqrt { \frac { 2eV }{ m } } \)
B. \(\sqrt { \frac { eV }{ m } } \)
C. \(\frac { ev }{ 2m }\)
D. \(\frac { ev }{ m }\)
Answer:A
An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final velocity will be-
A. \(\sqrt { \frac { 2eV }{ m } } \) B. \(\sqrt { \frac { eV }{ m } } \) C. \(\frac { ev }{ 2m }\) D. \(\frac { ev }{ m }\)