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The radius of an alıminum wire is 2 cm,and the speed of free electrons is 3.6x10-4...

The radius of an alıminum wire is 2 cm,and the speed of free electrons is 3.6x10-4 m/s. The load passing through the unit section of this wire varies as q(1) = (3t3-t2+4t-10)C .

In 10 s, the unit section of the wire find the passing charge,current intensity,current density,number of free electrons and resistance per length?

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Answer #1

Now since

So in 10s the charge passing through unit cross section is

So at 10s current intensity will be,

Current density

In 10 seconds the free electrons move through a distance of

and charge =2930C which contains electrons

So free electrons per unit length will be electrons/m

I don't think enough info is given to calculate the resistance per unit length

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