Home
Class 12
PHYSICS
Mobility of free electrons in a conducto...

Mobility of free electrons in a conductor is

A

directly proportional to electron density

B

directly proportional to relaxation time

C

inversely proportional to electron density

D

inversely proportional to relaxation time

Text Solution

Verified by Experts

The correct Answer is:
B

Electron mobility
`mu_(e)=(etau)/(m)`
`mu_(e)proptau`
Promotional Banner

Topper's Solved these Questions

  • K - CET - PHYSICS - 2018

    SUNSTAR PUBLICATION|Exercise MCQs|60 Videos
  • K-CET-PHYSICS-2014

    SUNSTAR PUBLICATION|Exercise MCQs|60 Videos

Similar Questions

Explore conceptually related problems

In the absence of electric field, the mean velocity of free electrons in a conductor at absolute temperature T is :

The number density of free electrons in the semiconductor is 10^18 m^-3. It is doped with a pentavalent impurity atoms of number density 10^24 m^-3 . The number density of free electrons m^-3 increases by a factor of

The number density of free electrons in a copper conductor is estimated as 8.5xx10^(28)m^(-3) . How long does an electron take to drift from one end of a wire 3.0m long to its other end? The area of cross-section of the wire is 2.0xx 10^(-6)m^(2) and it is carrying a current of 3.0A.

Define mobility of electrons. How is mobility of electrosns in a conductor related to relaxation time?

How does the random motion of free electrons in a conductor get affected when a potential difference is appplied across its ends ?

If the number density of electrons in a conductor is 3 xx10^(28) and thickness of the conductor is 5 mm, then calculate the current in that conductor for a drift velocity of 2 xx 10^(-4) ms^(-1) . If the voltage applied is 500 V , then calculate relaxation time. Given specific charge of electron = 1.76xx 10^(11) C kg^(-1) , length of the conductor = 10 m

SUNSTAR PUBLICATION-K-CET-PHYSICS - 2016-MCQs
  1. A capacitor of 8 F is connected as shown. Charge on the plates of the ...

    Text Solution

    |

  2. Four metal plates are arranged as shown. Capacitance between X and U (...

    Text Solution

    |

  3. Mobility of free electrons in a conductor is

    Text Solution

    |

  4. Variation of resistance of the conductor with temperature is as shown ...

    Text Solution

    |

  5. Potential difference between A and B in the following circuit

    Text Solution

    |

  6. In the following network potential at .O.

    Text Solution

    |

  7. Effective resistance between A and B in the following circuit

    Text Solution

    |

  8. Two heating coils of resistance 10Omega and 20Omega are connected in p...

    Text Solution

    |

  9. A Proton is projected with a uniform velcoity v long the axis of a cur...

    Text Solution

    |

  10. In the cylotron, as radius of the circular path of the charged particl...

    Text Solution

    |

  11. A conducting wire carrying current is arranged as shown. The magnetic ...

    Text Solution

    |

  12. The quantity of a charge that will be transferrred bya current flow of...

    Text Solution

    |

  13. A galvanometer coil has a resistance of 50 Omega and the meter shows f...

    Text Solution

    |

  14. X(1) and X(2) are susceptbiltity of a paramagnetic material at tempera...

    Text Solution

    |

  15. At certain place, the horizontal component of earth.s magnetic field i...

    Text Solution

    |

  16. The Process of superimposing message signal on high frequency wave is ...

    Text Solution

    |

  17. A long solenoid with 40 turns per cm carries a current of 1A. The magn...

    Text Solution

    |

  18. A wheel with 10 spokes each of length L m is rotated with a uniform an...

    Text Solution

    |

  19. The rms value of current in a 50 Hz AC circuit is 6A . The average val...

    Text Solution

    |

  20. A capcacitor of capacitance 10muF is connected to an AC source and an ...

    Text Solution

    |