Lorentz Force - Practice Questions & MCQ

A particle of charge -16 x 10^-18 coulomb moving with velocity 10 ms^-1 along the -axis enters a region where a magnetic field of induction B is along the -axis, and an electric field of magnitude 10⁴ V/m is along the negative -axis. If the charged particle continues moving along the -axis, the magnitude of B is

A charged particle with charge  enters a region of constant, uniform, and mutually orthogonal fields  with a velocity  perpendicular to both  and comes out without any change in magnitude or direction . Then

 In a certain region static electric and magnetic fields exist.  The magnetic field is given by

 If a test charge moving with a velocity experiences no force in that region, then the electric field in the region, in SI units, is :

In a certain region of space electric field and magnetic field are perpendicular to each other and an electron enters in region perpendicular to the direction of and both and moves undefected, then velocity of electron is