Question

Three different identical positively charge particles are pictured in the same magnetic field which points into the screen (represented by blue X's). The particles are moving at the same speeds but in different directions, as indicated by the red arrows.
How do the particles rank, in terms of the force they experience due to their movements in the magnetic field, greatest first?

• A. $1,2,3$
• B. $1$ and $2$ tie, $3$
• C. $3,1$ and $2$ tie
• D. $3,2,1$
• E. All tie

Answer 1

The correct option is E All tie

Magnitude of magnetic force acting on the particle $F=qvB$ $sin\theta$ where $\theta$ is the angle between $v$ and $B$

From figure, $\theta ={90}^o$ (for all the particles)

$\therefore$ Force on each particle $F=qvB$

Thus option E is correct.