There exist various standards for the safety limits of human exposure to electromagnetic radiation. one of them is the ieee standard, whose recommendations for the maximum permissible time-average intensity of the poynting vector in uncontrolled environments (where individuals generally have no knowledge or control of their exposure to em fields) at frequencies between 100 mhz and 300 ghz are as follows: (i) pavg, max=2 w/m2 for 100 mhz β€ f < 300 mhz, (ii) pavg, max= f/150 w/(mhz m2 ) for 300 mhz β€ f < 15 ghz,(iii) and pavg, max=100 w/m2 for 15 ghz β€ f < 300 ghz. based on this standard, compute the maximum permissible levels for the rms intensities of the electric and magnetic fields in air at frequencies of 150 mhz, 1.5 ghz, and 15 ghz respectively. note: β = || 2 = |οΏ½
Answers: 3
Physics, 22.06.2019 09:00
As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy
Answers: 2
Physics, 22.06.2019 09:30
An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?
Answers: 2
Physics, 22.06.2019 12:50
The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.
Answers: 1
Physics, 22.06.2019 14:30
Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity
Answers: 3
There exist various standards for the safety limits of human exposure to electromagnetic radiation....
Mathematics, 14.02.2021 21:30
Chemistry, 14.02.2021 21:30
Mathematics, 14.02.2021 21:30
Mathematics, 14.02.2021 21:30
Mathematics, 14.02.2021 21:30
History, 14.02.2021 21:30
Mathematics, 14.02.2021 21:30
Advanced Placement (AP), 14.02.2021 21:30
Mathematics, 14.02.2021 21:30