Change distance, direction of I, current, see field
http://www.thephysicsaviary.com/Physics/Programs/Labs/FieldFromWire/index.html
Helen rates this resource as Good
Change distance, direction of I, current, see field
http://www.thephysicsaviary.com/Physics/Programs/Labs/FieldFromWire/index.html
Helen rates this resource as Good
Change direction of current, see field lines, compass
http://www.walter-fendt.de/html5/phen/magneticfieldwire_en.htm
Helen rates this resource as Good
Change current/position of wires, see B field