Hi. New to the forums so bear with me. I am trying to calculate the magnetic field at a distance r from a wire carrying a 495Hz signal at 8Vpp and current 0.8mA. Initially I tried ampere's law, but fell into the trap of using the un-modified form (without maxwell's correction). I know that the field changes with the frequency, but I am unsure of exactly how they tie together, and I cant seem to find the relationship between dE/dt and frequency. Any ideas?