Question

A charged particle is projected at a very high speed perpendicular to a uniform magnetic field. The particle will
(a) move along a circle
(b) move along a curve with increasing radius of curvature
(c) move along a curve with decreasing radius of curvature
(d) move along a straight line

Answer 1

The answer is (a) move along a circle.

Explanation:

• When there is a projection of a charged particle with a very high-speed, there will be an increase in the mass to m = mo1-v2c2 from mo when it is perpendicular, thus resulting in the increase in the radius.  
• It is to be noted that there will be a projection of a charged particle perpendicular to a uniform magnetic field at a very high-speed.
• And this particle can be found to be moving along the circle forming a circular path.