The number density of electrons in a metal is 28 3 9.64 10 m− × . What is the drift velocity of electrons in a wire made up of this metal when a current of 4A flows in it given that its cross-sectional area is 2.0 mm2 ? How long will it take for an electron to travel a distance of 0.10 m in this wire
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Use current (i) =nAeVd
Where n= number density of electrons
A= area
e= electron charge (1.6 * 10^-19)
Vd= drift velocity
Apply this formulae and substitute the respective values form the question
And compute the value of Vd.
After finding the value Vd = speed = dist/time
Substituting dist value
And finally finding out time (t)
Where n= number density of electrons
A= area
e= electron charge (1.6 * 10^-19)
Vd= drift velocity
Apply this formulae and substitute the respective values form the question
And compute the value of Vd.
After finding the value Vd = speed = dist/time
Substituting dist value
And finally finding out time (t)
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