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  9. Q72

SSC Junior Engineer (Civil / Mechanical / Electrical) 2016 · Question 72 of 183

For thermionic emission _____.

  1. Aa material with high work function is preferable
  2. Ba material with low work function is preferableCorrect
  3. Cthe work function of the material has no importance
  4. DNone of these

Answer: B. a material with low work function is preferable

Official answer key verified. Detailed explanation coming soon.

Source: SSC Junior Engineer Examination 2016 — Paper-I (Electrical), 04/03/2017 Afternoon Shift · reliable-secondary

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