That will not work in any physics I know.If we assume the current is flowing in an infinitely long straight wire, just apply an electric field in the reverse direction of the flow of the current which is sufficient to stop them.
Well yah duh -- that's what I said if you read it.RANDALLB
All of your physical answers are used now with minimal impact.
Furthermore, this needs to be in quantum physics but someone moved it to classical physics.
So, the question still remains. How does one stop electron flow in a wire attached to a battery through a switch and on the other end an explosive or electronic circuit? When someone presses the switch, the current flows and a bomb goes off.
In the real world, you are right that it will not work. But in the physics of frictionless surfaces, and massless pulleys, and wires flying in space with a current on them without a power supply and constant electric fields without a source it may have worked.That will not work in any physics I know.