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What is the drift velocity of an electro...

What is the drift velocity of an electron in a copper conductor having area `10 xx 10^(-6) m^2`, carrying a current of 2A. Assume that there are `10 xx 10^(28)` electrons/ `m^3`.

Text Solution

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Area = `10 xx 10^(-6) m^2," Current = 2A,"`
Number of electrons / `m^3 = 10 xx 10^(28)`
` v_d = I/("nAe")`
Drift velocity,
`v_d = 2/(10 xx 10^(28) xx 10 xx10^(-6) xx 1.6 xx10^(-19))`
` = 2/(1.6 xx10^5) = 1.25 xx 10^(-5) ms^(-1)`
Dirft velocity ` = 1.25 xx10^(-5) ms^(-1)`
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