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Define the term 'mobility' of charge car...

Define the term 'mobility' of charge carriers. Write its S.I. unit.

Text Solution

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Mobility of charge carriers `(mu)`, responsible for currents is defined as the magnitude of drift velocity of charge per unit electric field applied
i.e., `mu= ("drift velocity")/("electric field") = v_(d)/E = v_(d)/(V//l) =v_(d)/(F//q)`
S.I. unit of mobility `=m^(2) V^(-1) s^(-1)= ms^(-1)N^(-1)C `
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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
  • The dimensions of mobility of charge carriers are

    A
    `[M^(-2)T^(2)A]`
    B
    `[M^(-1)T^(2)A]`
    C
    `M^(-2)T^(3)A]`
    D
    `[M^(-1)T^(3)A]`
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