Just visit this

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=179.0

Thats a java program which helps visualize the motion of electron in magnetic field. It might take some time to load so have patience. U can see the effect of what happens when:
magnetic field is changed
mass of the charged particle is changed

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=181.0
shows the magnetic field around a wire, wing and a solenoid


* These will work only of the web browser u r using has proper plugins installed.

if u like it dont forget to rate me