MHT CET20228 Aug 2022Evening ShiftPhysicsMagnetic Effects of CurrentActual
A charged particle moves through a magnetic field perpendicular to its direction. Then
Options
- Aboth momentum and kinetic energy of the particle are changed
- Bits momentum changes but its kinetic energy remains constant
- Cits kinetic energy changes but momentum remains constant
- Dboth momentum and kinetic energy of the particle remains constant
Correct answer
B. its momentum changes but its kinetic energy remains constant
Step-by-step solution
Magnetic force is perpendicular to the direction of motion of the particle. Therefore no external work is done and the kinetic energy remains constant. The particle undergoes uniform circular motion, however due to change in direction of motion velocity is not constant. So the momentum is not constant, during uniform circular motion. Therefore, option (B) is correct.