question_answer

An alpha particle is moving perpendicular to the uniform magnetic field of 0.5 T with the velocity\[3\times {{10}^{5}}\text{ }m{{s}^{-1}}\]. What is the work done by the particle?

A) \[1.5\times {{10}^{5}}J\]                     

B) Infinity

C) 3 J                   

D) Zero