Question

current density is unity. 9.20 In a dielectric ($\sigma$ = 10$^{-4}$ S/m, $\mu_r$ = 1, $\epsilon_r$ = 4.5), the conduction current density is given as $J_c$ = 0.4 cos(2$\pi$ × 10$^8$t) A/m$^2$. Determine the displacement current density. 9.21 In a source-free region, H = H$_o$cos($\omega$t ? $\beta$z)a$_x$ A/m. Find the displacement current density. 9.22 An ac voltage source is connected across the plates of a parallel-plate capacitor so that E = 25sin(10$^3$t)a$_z$ V/m. Calculate the total current crossing a 2 × 5 m area placed per- pendicular to the electric field. Assume that the capacitor is air filled.

          current density is unity.
9.20 In a dielectric ($\sigma$ = 10$^{-4}$ S/m, $\mu_r$ = 1, $\epsilon_r$ = 4.5), the conduction current density is given
as $J_c$ = 0.4 cos(2$\pi$ × 10$^8$t) A/m$^2$. Determine the displacement current density.
9.21 In a source-free region, H = H$_o$cos($\omega$t ? $\beta$z)a$_x$ A/m. Find the displacement current
density.
9.22 An ac voltage source is connected across the plates of a parallel-plate capacitor so that
E = 25sin(10$^3$t)a$_z$ V/m. Calculate the total current crossing a 2 × 5 m area placed per-
pendicular to the electric field. Assume that the capacitor is air filled.

current density is unity.
9.20 In a dielectric (σ = 10^-4 S/m, = 1, = 4.5), the conduction current density is given
as Jc = 0.4 cos(2π × 10^8t) A/m^2. Determine the displacement current density.
9.21 In a source-free region, H = Hocos(ωt ? βz)ax A/m. Find the displacement current
density.
9.22 An ac voltage source is connected across the plates of a parallel-plate capacitor so that
E = 25sin(10^3t)az V/m. Calculate the total current crossing a 2 × 5 m area placed per-
pendicular to the electric field. Assume that the capacitor is air filled.

Added by Francis B.

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