what is drift velocity
Answers
Answer:
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Explanation:
Drift velocity is defined as the average velocity attained by the particles (electrons) of a given material due to an electric field that is proportional to current. Ohm's law can be expressed in terms of drift velocity as follows: u=μE.
In physics a drift velocity is the average velocity attained by charged particles, such as electrons, in a material due to an electric field. In general, an electron in a conductor will propagate randomly at the Fermi velocity, resulting in an average velocity of zero.
We can calculate the drift velocity using the equation I = nqAvd. The current I = 20.0 A is given, and q = –1.60×10–19 C is the charge of an electron. We can calculate the area of a cross-section of the wire using the formula A = πr2 , where r is one-half the given diameter, 2.053 mm.
Drift Velocity Derivation
Drift velocity is defined as the average velocity attained by the particles (electrons) of a given material due to an electric field that is proportional to current. Ohm's law can be expressed in terms of drift velocity as follows: u=μE.
Is drift velocity constant?
Yes, drift velocity is independent of time. Drift velocity is the reason due to which current flows inside a conductor. In the derivation of the equation of drift velocity, we can see that acceleration "a" is constant and relaxation time "乁" is kept constant. So current and drift velocity does not depend on time.
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