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12.Atoms
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નીચેનામાથી કયા કણને $e/m$ નો ગુણોતર મહતમ હોય.

A
$A$
B
$B$
C
$C$
D
$D$
(AIIMS-2007)
Solution
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.
Standard 12
Physics