A rod of pure silicon (resistivity=2300 Ω*m ) is carrying a current

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A rod of pure silicon (resistivity=2300 Ω*m ) is carrying a current. The electric field varies sinusoidally with time according to E=E₀ sinωt where E₀=0.410 V/m, ω=2πf, f=120 Hz.

Part A:

Find the magnitude of the maximum conduction current density in the wire.

jc= (A/m²)

Part B:

Assuming , find the maximum displacement current density in the wire, and compare with the result of part A.

jD= (A/m²⁾

Part C:

At what frequency  would the maximum conduction and displacement densities become equal if  (which is not actually the case)?

f= (Hz)

Part D:

At the frequency determined in part C, what is the relative phase of the conduction and displacement currents?

Δφ= (degrees)