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Q.

The $e / m$ ratio of cathode rays is $x$ unit, when hydrogen is filled in the discharge tube. What will be its value when deuterium $(D_{2})$ is filled in it ?

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a

$2 x unit$

b

$x unit$

c

$x / 2 unit$

d

$x / 4 unit$

answer is A.

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Detailed Solution

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$\frac{e}{m}$ value of cathode rays is independent of nature of gas

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