Two different fields are set up in a region of space. They may be either an electric field or a magnetic field. An identical test charge is fired into each. From the particle trajectories, determine what kind of field is present in each. 
Field 1
Field 2

1st Magnetic and 2nd Electric - Correct!
Both magnetic
1st Electric and 2nd Magnetic
Both Electric


Physlet problem authored by Wolfgang Christian and Scott Bonham.