Home
Class 12
PHYSICS
If the ratio of the concentration of ele...

If the ratio of the concentration of electron to that of holes in a semiconductor is `(7)/(5)` and the ratio of current is `(7)/(4)` then what is the ratio of their drift velocities ?

A

` 4//7`

B

` 5//8`

C

`4//5`

D

`5//4`

Text Solution

Verified by Experts

The correct Answer is:
D
Drift velocity, `v_d=I/(nAe), i.e., v_ d prop1/n`
`:. ((v_e))/((v_h))=I_(e)/I_(h)xxn_(h)/n_(e)=7/4xx5/7=5/4`
Promotional Banner

Topper's Solved these Questions

  • ELECTRONIC DEVICES

    PRADEEP|Exercise LONG QUESTION ANSWER|2 Videos

  • ELECTRONIC DEVICES

    PRADEEP|Exercise PROBLEMS FOR PRACTICE|7 Videos

  • ELECTRONIC DEVICES

    PRADEEP|Exercise HIGHER ORDER THINKING SKILLS|1 Videos

  • ELECTROMAGNETIC WAVES

    PRADEEP|Exercise II Focus multiple choice question|5 Videos

  • ELECTROSTATICS

    PRADEEP|Exercise ASSERTION-REASON TYPE QUESTIONS|2 Videos

Similar Questions

Explore conceptually related problems

If the ratio of the concentration of electron to that of holes in a semiconductor is (7)/(5) and the ratio of currect is (7)/(4) then what is the ratio of their drift velocities ?

The ratio of electron and hole current in a semiconductor is (7)/(5) and the ratio of drift velocities electrons and holes is (1)/(4) ,then the ratio of concentrations of electrons and holes will be ?

The ratio of heights of two cylinders is 3 :2 and the ratio of their radii is 6 : 7 what is the ratio of their curved surface areas ?

The ratio of heights of two cylinders is 3:2 and the ratio of their radii is 6:7 . What is the ratio of their curved surface areas ?

The ratio of electron and hole currents in a semiconductor is 7/4 and the ratio of drift velocities of electrons and holes is 5/4, then the ratio of concentrations of electrons and holes will be

The ratio between the area of two circles is 4:7. What will be the ratio of their radii ?

If the mass ratio of O_2 and is 4:7 , then the ratio of their moles is

PRADEEP-ELECTRONIC DEVICES-Exercise
  1. An electric field us applied to a semiconductor.Let the number of char...

    Text Solution

    |

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

    Text Solution

    |

  3. If the ratio of the concentration of electron to that of holes in a se...

    Text Solution

    |

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

    Text Solution

    |

  5. The energy gap between conductionband and valence band is of the order...

    Text Solution

    |

  6. A semiconductor is known to have an electron concentric of 8xx10^(13)/...

    Text Solution

    |

  7. A Ge specimen is dopped with Al. The concentration of acceptor atoms i...

    Text Solution

    |

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

    Text Solution

    |

  9. Mobility of electron and holes in a sample of intristic germanium at r...

    Text Solution

    |

  10. In n-type semiconductor when when all donor states are filled, then th...

    Text Solution

    |

  11. In a semiconductor material (1//5)th of the total current is carried b...

    Text Solution

    |

  12. The number density of free electrons in the semiconductor is 10^(18)m^...

    Text Solution

    |

  13. A semiconductor having electron and linear mobilities mu(n) and mu(p) ...

    Text Solution

    |

  14. Identify the semiconductor device where characteristics are given belo...

    Text Solution

    |

  15. If a p-n junction diode, a square input signal of 10 V is applied as s...

    Text Solution

    |

  16. The dominant mechanisms for motion of charge carriers in forward and r...

    Text Solution

    |

  17. The circuit shown in figure (1) Contains two diodes each with a forwar...

    Text Solution

    |

  18. Which one of the following represents forward bias diode?

    Text Solution

    |

  19. A sinusiodal voltage of rms value 200 volt is connected to the diode a...

    Text Solution

    |

  20. In the given figure, a diode D is connected to an external resistance ...

    Text Solution

    |