Question

A charged particle begins to move in a magnetic field, initially parallel to the field. The direction of the field now begins to change, with its magnitude remaining constant. 

(a) The magnitude of the force acting on the particle will remain constant. 

(b) The magnitude of the force acting on the particle will change. 

(c) The particle will always move parallel to the field. 

(d) The speed of the particle will change.  

Answer 1

Correct Answer is: (b) The magnitude of the force acting on the particle will change.