1. Consider a parallel-plate capacitor immersed in sea water and driven by a voltage V₁ cos (2πvt). Let v = 4.0 × 10³ Hz: at this frequency, sea water has permittivity € = = 81€0, permeability μ = μo, and resistivity p = 0.23 2. m. (a) What is the ratio of the amplitude of the ohmic current to that of the displacement current? (b) Is the ohmic current in-phase or out-of-phase with the electric field? If out-of-phase, does the current lead or lag? By how much phase?

1. Consider a parallel-plate capacitor immersed in sea water and driven by a voltage V₁ cos (2πvt). Let v = 4.0 × 10³ Hz: at this frequency, sea water has permittivity € = = 81€0, permeability μ = μo, and resistivity p = 0.23 2. m. (a) What is the ratio of the amplitude of the ohmic current to that of the displacement current? (b) Is the ohmic current in-phase or out-of-phase with the electric field? If out-of-phase, does the current lead or lag? By how much phase?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 39P: The voltage across a parallel-plate capacitor with area A=800cm2 and separation d = 2 mm varies...

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