What effect will EMP and strong magnetic fields have low current circuitry?

What effect will EMP and strong magnetic fields have low current circuitry?
Will EMP and strong magnetic fields disable or disrupt the low current circuitry permanently?

EMP and rapidly-changing magnetic fields induce voltages that can permanently disrupt low-current circuitry, usually by destroying  semiconductor devices. During the Cold War, the USSR used vacuum tubes in the first radio-frequency amplifier stage of radio receivers, as it is difficult to zap a tube.https://en.wikipedia.org/wiki/March_1989_geomagnetic_storm describes how large-scale slowly-varying magnetic fields disrupted Hydro-Quebec's electricity-transmission system.

Thanks for this information. But the link you gave is dead.

"https://en.wikipedia.org/wiki/March_1989_geomagnetic_storm"  is a valid URL but is not a link, as you noted. Copy-and-paste the URL into the URL bar of your web browser.