b) mean drift velocity
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4 Terms
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define mean drift velocity
mean drift velocity = the net velocity of electrons moving through a conductor
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state the formula for electric current including mean drift velocity
state the relationship between the cross-sectional area and the mean drift velocity
I = Anev
electric current (A) = cross-sectional area of the conductor (m^2) × number density × elementary charge × velocity (ms^-1)
the mean drift velocity is inversely proportional to the cross-sectional area
if the cross-sectional area decreases, the mean drift velocity must increase for the electric current to stay the same
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