Home
Class 12
PHYSICS
The free electron concentration (n) in t...

The free electron concentration (n) in the conduction band of a semiconductor at a temperature T kelvin is described in terms of `E_(g)` and T as-

A

`n=Ate^(-Eq//T)`

B

`n=Ate^(2-Eg//lamdaT)`

C

`n = AT^(2) e^(-Eg//2kT)`

D

`n= AT^(3//2)e^(-Eg//2kT)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEM

    RESONANCE ENGLISH|Exercise DPP.No.71|1 Videos
  • DAILY PRACTICE PROBLEM

    RESONANCE ENGLISH|Exercise DPP No.71|10 Videos
  • CURRENT ELECTRICITY

    RESONANCE ENGLISH|Exercise High Level Problems (HIP)|19 Videos
  • ELECTRO MAGNETIC WAVES

    RESONANCE ENGLISH|Exercise Exercise 3|27 Videos

Similar Questions

Explore conceptually related problems

The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature

Assertion: The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature decrease exponentially with increasing band gap. Reason: It will be more difficult for the electron to cross over the large band gap while going from valence band to conduction band.

Thermal speed v of free electrons in a conductor at absolute temperaure T is proportional to

The de - Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T ("kelvin") and mass m , is

The de - Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T ("kelvin") and mass m , is

Assertion (A) : The electrical conductivity of a semiconductor increases with increase in temperature. Reason (R ) : With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

Assertion : The electrons in the conduction band have higher energy than those in the valence band of a semiconductor Reason : The conduction band lies above the energy gap and valence band lies below the energy gap.

The energy gaps (E_(g)) between valence band and conduction band for diamond, silicon and germanium are in the order

Let (Delta)E denote the energy gap between the valence band and the conduction band.The population of conduction electrons (and of the holes)is roughly proportional to e^(-Delta E//2kT). Find the ratio of the concentration of conduction electrons in diamond to that in silicon at room tempareture 300K. (Delta E) for silicon is 1.1 ev and for diamond is 6.0eV.How many conduction electrons are likely to be in one cubic meter of diamond ?

RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.72
  1. A radar has a power of 1 Kw and is operating at a frequency of 10 GHz....

    Text Solution

    |

  2. A diode detector is used to detect and amplitude modulated wave of 60%...

    Text Solution

    |

  3. An oscillator is producing FM waves of frequency 2 kHz with a variatio...

    Text Solution

    |

  4. The carrier frequency generated by a circuit containing 1 nF capacitor...

    Text Solution

    |

  5. A TV. Tower has a height 150 m.What is the population density around t...

    Text Solution

    |

  6. The T.V. transmission tower in Delhi has a height of 240m. The distanc...

    Text Solution

    |

  7. In an amplitude modulated wave for audio frequency of 500 cycles/secon...

    Text Solution

    |

  8. For a carrier frequency of 100 kHz and a modulating frequency of 5kHz ...

    Text Solution

    |

  9. It a carrier wave of 1000 kHz is used to carry the signal, the length ...

    Text Solution

    |

  10. The AM wave contans three frequencies viz:

    Text Solution

    |

  11. A wedge is moving with an acceleration a = 4m//s^(2) vertically up as ...

    Text Solution

    |

  12. Figure shows the roller coaster track. Each car will start from rest a...

    Text Solution

    |

  13. Two immisible liquids are pured in a U-tube having densities rho(1) = ...

    Text Solution

    |

  14. The free electron concentration (n) in the conduction band of a semico...

    Text Solution

    |

  15. Pure Si at 300 K has equal electron (n(e)) and hole (n(h)) concentrati...

    Text Solution

    |

  16. In an NPN transistor the collector current is 10 mA. If 90% of electro...

    Text Solution

    |

  17. For the logic circuit shown the boolean relation is-

    Text Solution

    |

  18. A wall is moving with constant velocity u towards a fixed source of so...

    Text Solution

    |

  19. A stationary observer receives sonic oscillations from two tuning for...

    Text Solution

    |

  20. The Vernier constant of a Vernier Callipers is

    Text Solution

    |