Hello, Think of a graph of the magnetic field strength [itex] B [/itex] vs time in a coil, from which a pulsed current passes. The time to reach [itex] B [/itex] is [itex] t_1 [/itex], and the time to drop to zero again is [itex] t_1+t_2 [/itex]. There is gas inside the coil, and we are trying to create plasma: The initial force applied on one electron is [itex] F [/itex] and [tex] F=Eq=ma [/tex] [tex] Eq/m=a=Δv/Δt [/tex][tex] Δv=EΔt(q/m) [/tex] and since [itex] E α ΔB/Δt [/itex]; [itex] EΔt α ΔB [/itex] which is equal for both the increasing and the decreasing parts of the graph thus the current induced must be zero at the end. So my question is, if no current is induced in such pulsed magnetic fields, how do field reversed configurations operate? Do they keep giving current after the pulse? Isn't it supposed to reverse the field after inducing a plasma current to form a seperatrix, that if it does so, doesn't the plasma get affected during the reversal? My question applies also for tokamaks and the formation of plasma in it. Thank you.