Magnetic white dwarfs (MWD) comprise almost 2 % of all white dwarfs and they are characterized by having a strong magnetic field, whose strength varies between 1 T and 100 kT. Compared to the Earth's magnetic field, whose strength varies between 25 µT and 65 µT, the magnetic field of a MWD is between 40 000 and 10⁹ times stronger than that of our planet.
On the other hand, the existence of exoplanets orbiting white dwarfs has already been proposed and they are likely to have a semi-major axis less than 0.02 AU. This made me wonder: is this distance really safe for the human's health or for electronic devices? I mean, suppose there is a planet orbiting a MWD with a strong magnetic field at a distance less than 0.02 AU. This planet is terraformed and inhabited by humans, forming a society like ours, very technologically advanced. So how would the magnetic field of the host star affect the inhabitants of this planet?, would they be able to tolerate it or would they die?, what would happen to commonly used electronic devices?, would they be damaged?
Please note that I am setting aside all the inconvenience of terraforming an exoplanet orbiting a white dwarf for practical reasons.