Humans will be humbled if we lost our technological use of electricity
I'm not certain how this can be accomplish unless we irradiate the whole planet with something that is not toxic to biological life by inhibits conduction
But yes progress will grind to a halt, rapid mass migration will cease to exist, food will be severely damage (people will starve), population will decline, wars will start, birth rate will drop
As a civilization, we ill probably regress rapidly, probably only thing that would regress us faster is a MEE - Mass Extinction Event (like a Meteor size of a small country striking the earth)