If the K.E. of a particle is doubled, then its momentum will
Remain unchanged
Be doubled
Be quadrupled
Increase $\sqrt 2 $ times
If the K.E. of a particle is doubled, then its momentum will
$P = \sqrt {2\,mE} $
$P \propto \sqrt E $
i.e. if kinetic energy of a particle is doubled the its momentum will becomes $\sqrt 2 $times.