Figure Q20.21 shows a straight wire of length L carrying a current I in a magnetic field of magnitude B. In all cases, the direction and magnitude of the field are the same everywhere. In which case is the magnetic force on the wire largest? In which case is it smallest? Order the situations from largest to smallest according to the magnitude of the force. 

Transcribed Image Text:

*в х * х в Case 1 Case 2 в Case 3 Case 4