Home
Class 12
PHYSICS
Define 'drift velocity' of free electron...

Define 'drift velocity' of free electrons .

Text Solution

Verified by Experts

It is defined as the average velocity with which with which free electrons get drifed towards the positive end of a conductor (opposite to the electric field) under the influence of an external electric field.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ANNUAL EXAM QUESTION PAPER MARCH - 2018

    SUNSTAR PUBLICATION|Exercise PART - B|8 Videos

  • ANNUAL EXAM QUESTION PAPER MARCH - 2018

    SUNSTAR PUBLICATION|Exercise PART - C|8 Videos

  • ANNUAL EXAM QUESTION PAPER MARCH - 2017

    SUNSTAR PUBLICATION|Exercise PART - C|40 Videos

  • ANNUAL EXAM QUESTION PAPER MARCH -2015

    SUNSTAR PUBLICATION|Exercise PART-A|37 Videos

Similar Questions

Explore conceptually related problems

Derive an expression for drift velocity of free electrons in a conductor.

What is drift velocity of free electrons ? Deduce I = n A eV_(d) where the symbols have their usual meaning.

Knowledge Check

  • A metal were is subjected to a constant potential difference. When the temperature of the metal wire increases, the drift velocity of the electron in it

    A
    Increases, thermal velocity of the electron increases.
    B
    Decreases, thermal velocity of the electron increases.
    C
    Increases, thermal velocity of the electron decreases.
    D
    Decreases, thermal velocity of the electron decreases.

  • A metal wire is subjected to a constant potential difference . When the temperature of the metal wire increases , the drift velocity of the electron in it

    A
    increases , thermal velocity of the electron increases
    B
    decreases , thermal velocity of the electron increases
    C
    increases , thermal velocity of the electron decreases
    D
    decreases , thermal velocity of the electron decreases

    • Similar Questions

    Explore conceptually related problems

    What is the order of drift velocity of electrons?

    Aconductor wire having 10^29 free el ectrons//m a current of 20A. If the cross-section of the 1 mm^2 , then the drift velocity of electrons will be

    If the radius of a wire carrying current is doubled, the drift velocity of the electrons will be :

    Obtain the expression for electric current in a conductor in terms of drift velocity of the electron. Defien resistivity of the material of the conductor.

    A copper wire has 3xx 10^(22) free electrons in 0.021 m length. The drift velocity of electrons is found to be 2xx10^(-5)ms^(-1) . How many electrons would pass through a given cross-section of the wire in one second?

    A copper wire has 3xx 10^(22) free electrons in 0.021 m length. The drift velocity of electrons is found to be 2xx10^(-5)ms^(-1) . How large a current will flow through the wire?

    Home
    Profile