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Q.

The specific charge for cathode rays is

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a

Variable

b

Constant

c

Dependent upon the material of the cathode

d

Dependent upon the nature of gas in the discharge tube

answer is A.

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Detailed Solution

Cathode rays means −ve charged rays . The charge and mass of any electron is same and fixed hence specific charge(e/m) for all cathode rays value is constant.

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