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The e/m ratio of cathode rays is x unit,...

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?

A

x unit

B

`x//2` unit

C

`2x` unit

D

`x//4` unit

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The correct Answer is:
A
e/m value of cathode rays independent on the nature of gas
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