What is drift speed?
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Posted by Geetanand Yadav 5 years, 2 months ago
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Gaurav Seth 5 years, 2 months ago
The velocity gained by the accelerating electrons in uniform electric field inside the conductor is drift velocity. The average velocity, acquired by free electrons along the length of a metallic conductor, due to existing electric field is called drift velocity.
Let ‘n’ be the number density of free electrons in a conductor of length ‘l’ and area of cross-section ‘A’.
Total charge in the conductor, Q = Ne
= (nAl)e
Time taken, t is given by,
Therefore, the current flowing across the conductor is given by,
, which is the amount of current flowing through a conductor in terms of drift velocity.
That is,
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