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Region which have no free electron and h...

Region which have no free electron and holes in P-N junction is

A

P-region

B

N-region

C

junction

D

depletion region

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Verified by Experts

The correct Answer is:
D
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Using the microscopic form of Ohm's law (J=sigma E) , prove that conductivity of a metal can be written as sigma="ne"mu . Here n is the number of free electrons per unit volume and mu is mobility of free electrons . In case of semiconductors there are two types of conduction particles, one is free electrons and the other is known as a hole. Charge on the hole may be assumed to be equal and opposite of that on electron. The number density of free electrons and holes in the semiconducting material are n and p respectively. Assuming mu_e and mu_h as mobility of free electrons and holes respectively , write the exopression of conductivity of the semiconducting material.

RESONANCE-SEMICONDUCTORS-Exercise
  1. Druing P-N junction formation when the electron and holes stops moving...

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  2. The value of barrier potential of P-N juntion in Ge is-

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  3. Region which have no free electron and holes in P-N junction is

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  4. A device whose one end is connected to -ve terminal and other end conn...

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  5. In a p-n junction diode, the barrier potential opposes diffusion of

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  6. PN-junction diode works as a insulator, if connected

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  7. If the forward voltage in a diode is increased, the width of the deple...

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  8. The resistance of a reverse baised P-N junction diode is about-

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  9. In which case is the junction diode is not reverse bias-

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  10. If V(A) and V(B) denote the potentials of A and B, then the equivalent...

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  11. Avalanche breakdown is due to

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  12. If the two ends of a p-n junction are joined by a wire ,

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  13. Symbolic representation of photodiode is

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  14. Symbol of zener diode-

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  15. Consider the following statements A and B and identify the correct ans...

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  16. Two junction diodes, one of germanium (Ge) and other of silicon (Si) ...

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  17. When light falls on a photo diode, its conductivity increases. Experim...

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  18. If the forward voltage in a semiconductor diode is chaged form 0.5 V t...

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  19. When the reverse potential in a semiconductor diode are 10 V and 30 V,...

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  20. If the frequency of input alternating potential in n, then the ripple ...

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