7.27 At 2 GHz, the conductivity of meat is on the order of1 (S/m). When a material is placed inside a microwave ovenand the field is activated, the presence of the electromagneticfields in the conducting material causes energy dissipation inthe material in the form of heat.(a) Develop an expression for the time-average power permm3 dissipated in a material of conductivity σ if the peakelectric field in the material is E0.(b) Evaluate the result for an electric field E0 = 4×104 (V/m).

image 268 - 7.27 At 2 GHz, the conductivity of meat is on the order of1 (S/m). When a material is placed inside a microwave ovenand the field is activated, the presence of the electromagneticfields in the conducting material causes energy dissipation inthe material in the form of heat.(a) Develop an expression for the time-average power permm3 dissipated in a material of conductivity σ if the peakelectric field in the material is E0.(b) Evaluate the result for an electric field E0 = 4×104 (V/m).

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