Question

A particle with certain charge enters a region of constant, uniform and mutually orthogonal fields E and B with a velocity u perpendicular to both E and B and comes out without any change in magnitude or direction u. This means that

• A. Force acting on particle is Inclined at an angle of ${180}^o$
• B. Force acting on particle is highly directional
• C. Force acting on charged particle is zero
• D. Charge on particle is too high

Answer 1

The correct option is A Force acting on particle is Inclined at an angle of ${180}^o$

Force acting on changed particle is zero, as v of changed particle remains constant
$F=q(v\times B)$