# An ionized gas contains both $+ve$ and $-ve$ ions. If an electric field is applied in the $+x$ direction and a magnetic field is applied in the $+z$ direction,

$\begin {array} {1 1} (a)\;+ve \: ions \: deflect \: towards \: the \: +y \: direction \: and \: –ve \: ions \: deflect \: towards \: the \: –y \: direction \\ (b)\;+ve \: ions \: deflect \: towards \: the \: -y \: direction \: and \: –ve \: ions \: deflect \: towards \: the \: +y \: direction \\ (c)\;All \: ions \: deflect \: towards \: the\: +y \: direction \\ (d)\;All \: ions \: deflect \: towards \: the\: -y \: direction \end {array}$

Ans : (d)