Physics

Problem

A charged particle of charge

q

enters a region containing mutually perpendicular uniform electric field of magnitude

E

and magnetic field of magnitude

B

. Its velocity vector is perpendicular to both fields. The particle will move straight without any deflection when its speed

v

is a)

\dfrac{2E}{B}

\dfrac{E}{B}

\dfrac{E}{2B}

\dfrac{\sqrt{2}\,E}{B}