Home
Class 12
PHYSICS
The drift velocity of the electrons in a...

The drift velocity of the electrons in a copper wire of length 2m under the application of a potential difference of 100 V is 0.2 `ms^(-1)`. Their mobility is (in `m^2 v^(-1) s^(-1)`)

A

`2.5xx10^(-3)`

B

`2.5xx10^(-2)`

C

`1.0xx10^2`

D

`4.0xx10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    MBD PUBLICATION|Exercise QUESTION BANK|174 Videos

  • DISPERSION OF LIGHT

    MBD PUBLICATION|Exercise QUESTION BANK|111 Videos

Similar Questions

Explore conceptually related problems

Prove that the energy stored in a capacitor of capacitance C charged to a potential difference V is 1/2"CV"^(2)

MBD PUBLICATION-CURRENT ELECTRICITY-QUESTION BANK
  1. A current of 5 A flowing through a wire of cross-sectional area 4xx10^...

    Text Solution

    |

  2. A potential difference of 10V is applied across, a conductor of length...

    Text Solution

    |

  3. The drift velocity of the electrons in a copper wire of length 2m unde...

    Text Solution

    |

  4. The mean free path of electrons in a metal is 5xx10^(-8)m. The electri...

    Text Solution

    |

  5. When the length and area of cross-section both are doubled, then it's ...

    Text Solution

    |

  6. A certain wire has a resistance R. The resistance of another wire iden...

    Text Solution

    |

  7. The resistance of a wire is R. If the length of the wire is doubled by...

    Text Solution

    |

  8. Dimension of resistance is:

    Text Solution

    |

  9. The VI characteristics of four circuit elements are shown. Which of th...

    Text Solution

    |

  10. An electric bulb has a rating 500W, 100V. It is used in a circuit havi...

    Text Solution

    |

  11. The resistivity of material is expressed in:

    Text Solution

    |

  12. The electric intensity ( E ), current density (J) and specific resista...

    Text Solution

    |

  13. A material B has twice the specific resistance of 'A'. A circular wire...

    Text Solution

    |

  14. The specific resistance of a wire is rho, it's volume is 3m^3 and its ...

    Text Solution

    |

  15. Two wires that are made up of different materials have their specific ...

    Text Solution

    |

  16. The electric field (E),current density (J) and conductivity (sigma) of...

    Text Solution

    |

  17. A wire when connected to 220V mains supply has power dissipation P1 . ...

    Text Solution

    |

  18. A bulb of 220V and 300 W is connected across 110v circuit .The percent...

    Text Solution

    |

  19. The power of a heater is 750 W at 1000^@C.What will be it's power at ...

    Text Solution

    |

  20. Number of colour band marked on carbon resistors is :

    Text Solution

    |