The specific charge for cathode rays is

Constant

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Variable

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Depend upon the material of the cathode

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Depend upon the nature of the gas in the discharge tube

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Solution

The correct option is B Constant
Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes.
Charge $= - e$
Mass $= m_{e}$
Specific Charge $= \frac{C h a r g e}{M a s s} = \frac{e}{m_{e}}$ = Constant

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Similar questions

(a) What are cathode rays? What is the nature of charge on cathode rays?

(b) Explain how, cathode rays are formed from the gas taken in the discharge tube.

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