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NEET-XII-Physics

41: Electric Current through Gases

with Solutions -
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  • #8
    Why does thermionic emission not take place in non-conductors?
    Ans : For thermionic emission, material should have low work function and large number of free electrons. But nonconductor does not have free electrons and they have higher work function. So, thermionic emission does not takes place in non-conductors.
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