Question: For an electronic system with constant scattering time = 10 11 s and effective electron mass one-tenth the vacuum electron mass, determine the magnetic

For an electronic system with constant scattering time τ = 10⁻¹¹ s and effective electron mass one-tenth the vacuum electron mass, determine the magnetic field at which magnetoresistance effects become important, that is, when σ_xy is equal to σ_x_x.

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