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Assertion (A) : C,Si and Ge have 4 Valan...

Assertion (A) : `C,Si` and `Ge` have `4` Valancy each both but `C` is an insulator where as `Si` and `Ge` are semi conductors
Reason `( R)` : Energy gap is least for `Ge`, less for `Si` compared to `C`, So that free electrons for conduction in `Ge` and `Si` are significant but negligible small for `C`.

A

`A,R` are true and `R` explains `A` correctly

B

`A,R` are true and `R` do not explain `A` correctly

C

`A` is true, but `R` is false

D

`R` is true, but `A` is false

Text Solution

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The correct Answer is:
A
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NARAYNA-SEMI CONDUCTOR DEVICES-C.U.Q
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  2. When the conductivity of a semiconductor is only due to breaking of co...

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  3. Assertion (A) : C,Si and Ge have 4 Valancy each both but C is an insul...

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  8. If the input frequency of half-wave rectifier is n Hz ac, then its out...

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  9. p-n junction diode acts as

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  10. The process of converting alternating current into direct current is k...

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  11. On increasing reverse voltage in a p-n junction diode the value of rev...

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  12. In forward bias the depletion layer behaves like

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  13. p-n junction in reverse bias behaves like

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  14. The main cause of avalence breakdown is

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  15. The main cause of Zener breakdown is.

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  16. When p-n junction is forward biased, the current across the junction i...

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  17. The current through any p-n junction is due to (a) drift of charge c...

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  18. The thickness of depletion layer is approximately

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  19. The depletion region is

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