The magnetic field imparts {TAIL ~ little force} on {HEAD ~ the relatively heavy and slow moving positive ions} but has a significant impact on the relatively fast moving, light weight electrons 
The magnetic field imparts { TAIL ~ little force } on { HEAD ~ the relatively heavy and slow moving positive ions } but has a significant impact on the relatively fast moving , light weight electrons
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH