b) Mean drift velocity

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4 Terms

1
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  • define mean drift velocity

  • the net velocity of electrons moving through a conductor

2
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  • state the formula for electric current including mean drift velocity

  • I = Anev

    • electric current (A) = cross-sectional area of the conductor (m^2) × number density (m^-3) × elementary charge × velocity (ms^-1)

3
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  • state the relationship between cross-sectional area and mean drift velocity

  • inversely proportional

4
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  • state why cross-sectional area and mean drift velocity are inversely proportional

  • for electric current to stay the same → mean drift velocity must decrease if cross-sectional area increases