In an electron gun electron are accelerated through a potential dif...

In an electron gun electron are accelerated through a potential difference V. If \( e= \) charge of electron and \( m= \) mass of electron then maximum electron velocity will be
a. \( 2 \mathrm{e} V / m \)
b. \( \sqrt{2 e V / m} \)
c. \( \sqrt{2 m / e V} \)
d. \( V^{2} / 2 \mathrm{em} \)