EEE MCQ: Basic Electronics

Voltage and Current are not the same thing, although they are very closely related. In simple terms, Voltage causes Current. Given a Voltage and a path for the electrons, current will flow. Given the path, but no Voltage, or Voltage without the path, there will be no Current.

1. The outermost orbit of an atom can have a maximum of -----elecrons.
2. When the outermost orbit of an atom has less then 4 electrons, the material is generally a --
3. The valence electron has---
4. The principal electrodes present in every vacuum tube are--
5. The output of a rectifier is---
6. A vacuum diode acts as a--
7. The solid state equivalent of thyratron is--
8. A thyratron can be used as --
9. When an electron jumps from higher orbit to a lower orbit, it----energy.
10. A semiconductor has--band.
11. The electron in the conduction band are knows as--
12. In insulator , the energy gap between valence and conduction bands is--
13. In conductor , the energy gap between valence and conduction bands is--
14. According to Bohr's theory of atom, an electron can move in an orbit of--
15. In a semiconductor, the energy gap between valence and conduction bands is about--
16. In a insulator, the energy gap between valence and conduction bands is about--
17. A semiconductor is formed by ... bonds.
18. A semiconductor has ..... temperature co-efficient of resistance.
19. The most commonly used semiconductor is..

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