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Q.

An electron is known as universal particle because

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a

Its charge and mass ratio does not depend on the source of its emission

b

All of these

c

It is found in all atoms

d

It has a fixed charge

answer is D.

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Detailed Solution

Electron charge to mass ratio (e/m) does not depend on source of its emission. Because electrons are the basic constituents of matter and these are same nature in all the atoms of elements.

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