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12. atoms — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics12. atoms1 Mark
MCQ
In the following diagram, which particle has highest $e/m$ value?
  • A
    $A$
  • B
    $B$
  • C
    $C$
  • ✓
    $D$
✓

Answer

Correct option: D.
$D$
d
The deflection of a particle along $y-$axis is electricfield is given by $y=\frac{E e x^{2}}{2 m v^{2}}$

$\Rightarrow \mathrm{y} \propto \frac{\mathrm{e}}{\mathrm{m}}$ for all other values to be constant. since $y$ is maximum for $D$, hence it has highest $e/m $ ratio.

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