Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz?
The body reacts to electromagnetic radiation from both the E and H fields
Ground reflections and scattering cause the field strength to vary with location
E field and H field radiation intensity peaks can occur at different locations
All these choices are correct✓پاسخ درست
توضیح
Below 300 MHz a person can still be within the reactive near field, where the electric and magnetic fields are not tied together by the 377-ohm impedance of free space, so their intensity peaks can occur at different places and each field has to be limited separately. Ground reflections and scattering make both vary with location, and the body absorbs energy from both, so every one of the statements holds.