Hi, Can people please help me with this both qualitatively and quantitatively... 1) If I have a long straight wire carrying a DC current, what field(s) should I expect outside of it? 2)a) If, as an example, I had a stream of charge particles (say electrons), moving perpendicular across the long straight dc current carrying wire what would happen to them? b) For the quantitative aspect, if these was an electron, traveling at a non relativistic speed of say 1e7 m/s, what force would be exerted on it by a dc current carrying wire having a current of say 5A? c) If we were to measure the deflection of this electron at some distance further along its path, say we had a phosphor screen some 10 cm away, how much would the electron be deflected by (relative to a zero deflection with the current source turned off)? Would this deflection be in one plane or two (i.e., vertical or horizontal... and/or would there also be an axial change in velcity (i.e., in z)? This is a seemingly simple case yet I am struggling to understand it. any help or suggestions would be appreciated. thanks!