A particle of charge q and mass `m` is moving along the x-axis with a velocity `v` and enters a region of electric field `E` and magnetic field `B` as shown in figures below. For which figure the net force on the charge may be zero?

A particle having charge q moves with a velocity v through a region in which both an electric field vecE and a magnetic field B are present. The force on the particle is

A particle having charge q moves with a velocity v through a region in which both an electric field vecE and a magnetic field B are present. The force on the particle is

A charge q moves region in a electric field E and the magnetic field B both exist, then the force on its is

A charge q moves region in a electric field E and the magnetic field B both exist, then the force on its is

A particle of charge q is moving with velocity v in the presence of crossed electric field E and magnetic field B as shown. Write the condition under which the particle will continue moving along x-axis. How would the trajectory of the particle be affected if the electric field is switched off?