the relationship between current and drift velocity?any 5 points
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drift velocity =vd
number of free e− per unit volume =n
length of conductor =l
cross sectional area of conductor=A
So total free electrons in given conductor =n(lA)
Total charge q=n(lA)e, Time t=lvd
Now current l=qt=nlAe(l/vd), where t=l/vd
=≠Avd⇒I=≠Avd
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