206 Sources of the Magnetic FieldP30.59Model the two wires as straight parallel wires (!)(a)FIaB=µπ022A(Equation 30.12)FB=××=−−410140201002 1 00 10246723ππejafaf... Nupward(b)amgmlooplooploop2Nms=−=107.upwardFIG. P30.59P30.60(a)In drIdBsr=×024±, the moving charge constitutes a bit of current as in InqvA=. For apositive charge the direction of dsis the direction of v, so drnqA dsBvr024af±. Next,Adsafis the volume occupied by the moving charge, and nA dsaf=1 for just one charge.Then,r024rq±.(b)B=×⋅×××°=×−−−−4101 60 102 00 104 1 00 1090 03 20 1071973213TmACTejej...sin..(c)FqB=×××°vB1 60 102 00 103 20 1090 019713.sin.C msTejFB−102 1024.N directed away from the first proton
This is the end of the preview. Sign up
access the rest of the document.