Q.

The charge to mass ratio on cathode rays in the discharge tube is constant because _______ are common constituents of all matter

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a

Electrons

b

Positrons

c

Protons

d

Neutrons

answer is A.

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Detailed Solution

The charge to mass ratio value of cathode rays is universal constant. Because an electron is known as universal particle and it is common to all constituents of matter.

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