Define relaxation time of free electrons drifting in a conductor?
Question: Define relaxation time of free electrons drifting in a conductor?
The relaxation time of free electrons drifting in a conductor is a measure of how long it takes for the electrons to reach a steady state after being subjected to an external electric field. The relaxation time depends on the properties of the conductor, such as its resistivity, temperature, and impurities. The relaxation time can be calculated using the Drude model, which assumes that the electrons behave like a classical gas of charged particles that collide with fixed ions in the lattice. The relaxation time is inversely proportional to the collision frequency, which is the average number of collisions that an electron experiences per unit time. The relaxation time can also be related to the conductivity and the mobility of the electrons, which are measures of how easily the electrons can move through the conductor under an electric field.
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