Chapter 1 ELECTRON EMISSION AND BASIC SEMICONDUCTOR THEORY MCQs

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1. .1 The particles in the nucleus of an atom are





2. .3 Controlling factor for primary emission is





3. .4 Controlling factor/s for secondary emission is





4. .5 Controlling factor/s for photo emission is





5. .7 No. of electrodes in diode valve/tube is/are





6. .8 No. of electrodes in triode valve/tube is/are





7. .9 No. of electrodes in tetrode valve/tube is/are





8. .10 No. of electrodes in pentode valve/tube is/are





9. .11 Number of electrons in outermost shell of semiconductor material is





10. .12 Number of electrons in outermost shell of trivalent atoms is





11. .13 Number of electrons in outermost shell of pentavalent atoms is





12. .14 In N-type semiconductors majority charge carriers are





13. .15 In P-type semiconductors majority charge carriers are





14. .16 In N-type semiconductors minority charge carriers are





15. .17 In P-type semiconductors minority charge carriers are





16. .18 Resistance of semiconductors ------ with doping





17. .19 Conductance of semiconductors ------ with doping





18. .20 The forbidden energy gap of a semiconductor is





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