A voltage source V 0 sin t is connected between two concentric conducting spheres, r = a

A voltage source V₀ sin ωt is connected between two concentric conducting spheres, r = a and r = b, b > a, where the region between them is a material for which ∈ = ∈_r ∈₀, μ = μ₀, and σ = 0. Find the total displacement current through the dielectric and compare it with the source current as determined from the capacitance (Section 6.3) and circuit-analysis methods.