Energy Carried by Electromagnetic Waves Video Lessons

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# Problem: On its highest power setting, a microwave oven can increase the temperature of 0.425 kg of spaghetti by 45°C in 120 seconds. If the average intensity of the microwaves absorbed by the spaghetti is 2.23 × 104 W/m2:A) What is the peak electric field strength, in volts per meter, absorbed by the spaghetti?B) What is the corresponding peak magnetic field strength, in teslas?

###### FREE Expert Solution

The maximum electric field:

$\overline{){{\mathbf{E}}}_{{\mathbf{0}}}{\mathbf{=}}\sqrt{\mathbf{\left(}\frac{\mathbf{2}\mathbf{I}}{{\mathbf{c\epsilon }}_{\mathbf{0}}}\mathbf{\right)}}}$

c is the speed of light.

Peak magnetic field:

$\overline{){{\mathbf{B}}}_{{\mathbf{0}}}{\mathbf{=}}\frac{{\mathbf{E}}_{\mathbf{0}}}{\mathbf{c}}}$

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###### Problem Details

On its highest power setting, a microwave oven can increase the temperature of 0.425 kg of spaghetti by 45°C in 120 seconds. If the average intensity of the microwaves absorbed by the spaghetti is 2.23 × 10W/m2:

A) What is the peak electric field strength, in volts per meter, absorbed by the spaghetti?

B) What is the corresponding peak magnetic field strength, in teslas?