Question

Two charge particles each of mass $m$ and charge $q$ are projected in a uniform magnetic field $B$ with the same speed as such planes of motion of particles are perpendicular to magnetic field $B$, then

• A. they move on circular path of same radii
• B. the magnetic force on them are same to each other
• C. the kinetic energy of particles are same to each other
• D. all the above

Answer 1

The correct option is D all the above

1.Magnetic force is always perpendicular to velocity therefore it does not affect the magnitude of velocity hence kinetic energy does not change.

2. As speed is same and both velocity are perpendicular to magnetic field hence magnitude of force on both charge is same.

3. Radius is given by mv/qB as all are same therefore their radius is also same.