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Define the term 'drift velocity' of char...

Define the term 'drift velocity' of charge carriers in a conductor and write its relationship with the current flowing through it.

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Drift velocity of charge carriers in a conductor is defined as that average velocity with which charge carriers drift in the presence of an external electric field.
Current` I=n Aev_d` ,
where n=number density of conduction electrons,
A=cross-section area of conductor and e=charge on an electron.
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Knowledge Check

  • Mobility of charge carrier in conductor is

    A
    directly proportional to E, Inversely proportional to `v_d`
    B
    inversely proportional to E, directly proportional to `v_d`
    C
    directly proportional to both `v_d` and E
    D
    Inversely proportional to both `v-d` and E

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