• # question_answer When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their- A) Energy decreasesB) Energy increasesC) Momentum increasesD) Momentum and energy remain unchanged

$F\bot v$ $F.v=0$ $P\,\,=\,\,0$=0 $\Delta K\,\,=\,\,0$ $K\,\,=\,\,constant$