Problem

# A rod of pure silicon (resistivity ρ = 2300 Ω ∙ m) is carrying a current. The electric fie...

A rod of pure silicon (resistivity ρ = 2300 Ω ∙ m) is carrying a current. The electric field varies sinusoidally with time according to E = E0 sin ωt. where E0 = 0.450 V/m, ω = 2πf, and the frequency f = 120 Hz. (a) Find the magnitude of the maximum conduction current density in the wire. (b) Asuuming ε = ε0, find the maximum displacement current density in the wire, and compare with the result of the part (a). (c) At what frequency f would the maximum conduction on displacement densities become equal. If ε = ε0 (which is not actually the case)? (d) At the frequency determined in part (c). What is the relative phase of the conduction and displacements currents?

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