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Pure Si at 500 K has equal number of ele...

Pure Si at 500 K has equal number of electron `(n_(e))` and hole `(n_(h))` concentration of `1.5xx10^(16) m^(-3)`. Doping by indium increases `n_(h)` to `4.5xx10^(22) m^(-3)`. The doped semiconductor is of :

A

n-type with electron concentration `n_(e) = 2.5 xx 10^(23)m^(-3)`

B

p-type having electron concentrations `n_(e) = 5 xx 10^(9)m^(-3)`

C

n-type with electron concentration `n_(e) = 2.5 xx 10^(22)m^(-3)`

D

Semi-conductor crystal

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )-Assignment section -C (Previous years type question)
  1. A zener diode having breakdown voltage equal to 15V, is used in a volt...

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  2. In the following figure, the diodes which are forwards biased are :

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  3. Pure Si at 500 K has equal number of electron (n(e)) and hole (n(h)) c...

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  4. A common emitter amplifier has a voltage gain of 50, an input impedanc...

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  5. To get an output 1 from the circuit shown in figure the input must be ...

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  6. The device that can act as a complete electronic circuit is

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  7. Which of the following statement is false?

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  8. Which one of the following bonds produces a solid that refleets...

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  9. The following figure shows a logic gate circuit with two inputs A and ...

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  10. The vapour pressure of two pure liquids A and B that forms an ideal so...

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  11. The symbolic representation of four logic gates are given below : ...

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  12. A p-n Photodiode is fabricated from a semiconductor with a band gap of...

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  13. A transistor is operated in common-emitter configuration at V(c) = 2 v...

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  14. Sodium has body centred packing. Distance between two nearest atoms is...

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  15. If the lattice parameter for a crystalline structure is 3.6Å, then the...

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  16. The voltage gain of an amplifier with 9% negative feedback is 10. The ...

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  17. The circuit

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  18. A p-n photodiode is made of a material with a band gap of 2.0 eV. The ...

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  19. In the energy band diagram of a material shown below, the open circles...

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  20. A common emitter amplifier has a voltage gain of 50, an input impedanc...

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