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In a semiconductor, (i)there are no fr...

In a semiconductor,
(i)there are no free elctrons at `0K`
(ii) there are no free elctrons at any tempreture
(iii) the number of free electrons increases with tempreture
(iv) the number of free electrons is less than that in a conductor

A

`(i),(ii)`

B

`(i),(iii),(iv)`

C

`(ii),(iii)`

D

`(ii),(iv)`

Text Solution

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The correct Answer is:
B
NA
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CP SINGH-SEMICONDUCTORS-Exercises
  1. A hole in a semiconductor is

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  2. Electric conduction in a semiconductor takes place due to

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  3. In a semiconductor, (i)there are no free elctrons at 0K (ii) there...

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  4. A pure semiconductor has

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  5. when the electrical conductivity of a semiconductor is due to the brea...

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  6. In an intrinsic semiconductor

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  7. Let n(p) and n(e), be the numbers of holes and condution electrons in ...

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  8. If tempreture is increased, the number of electron-hole pairs increase...

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  9. A strip of copper and another of germanium are cooled from room tempre...

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  10. An electric field us applied to a semiconductor.Let the number of char...

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  11. Solids having highest energy level partially filled with electrons are

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  12. In semiconductors at a room tempreture

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  13. The state of the energy gained by valence electrons when the temperatu...

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  14. Energy band in solids are a consequence of

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  15. Which of the following is semi-conductor?

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  16. Carbon , silicon and germanium have four valence elcectrons each . The...

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  17. Carbon , silicon and germanium have four valence electrons each . At r...

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  18. C and Si both have same lattice structure, having 4 bonding electrons ...

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  19. The difference in the variation of resistance with temperature in a me...

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  20. The probbility of electrons to be found in the conduction band of an i...

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