High Frequency Helmholtz Coils Generatesic Field
20/01/2016· At high frequency the coil impedance is very high such that high voltage is needed to drive high current through the coil. For example, at 200 kHz the impedance of a 2mH coil will be 2512 ohm. If you drive the coil with a 40V for example, you would get about 16mA 40V/2512 ohm = 16mA.






































