Explore BrainMass

Explore BrainMass

    Cellular phone vs. microwave oven

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    The average output power of a GSM cellular phone is 1.0W when it is "ON". The phone can be treated as a point source of E-M waves emitting spherical waves.

    (a) Calculate the intensity and peak electric field E(max) of the phone's E-M waves in your brain, which is about 5.0cm away from the phone when it is applied directly against year ear.

    (b) What is the intensity and peak electric field of E-M wave inside a microwave oven, whose area of cross-section is A=0.25m x 0.30m and the average E-M wave power is 500-W.

    (c) How the electric field in (a) compares with the safety regulation of EPA for microwave oven, which says that leaking of more than 5% of the E-field from the oven is harmful to the human body.

    © BrainMass Inc. brainmass.com October 10, 2019, 8:00 am ad1c9bdddf

    Solution Preview

    a. Intensity,
    I = P/(4pi r^2) = 1/(4*pi*0.05^2) = 31.83 W m^-2

    I = c e0 E^2
    => E = sqrt(I/c e0) = sqrt(31.83 / ...

    Solution Summary

    For a specified microwave oven and a cellular phone, intensity and peak electric fields are estimated and the fields are compared. The intensity and peak electric field of the cellular phone's E-M waves in the brain.