A proton is moving in a region of uniform magnetic field The magnetic field is directed into the plane of the paper: The arrow shows the velocity of the proton at one instant and the dotted circle gives the path followed by the proton: [2 marks] proton Explain why the path of the proton is circle_ 3b. The speed of the proton is 2.7 106 m s-1 and the magnetic field strength B is 0.41 T. [2 marks] Calculate the radius ofthe circular motion: 3c. Calculate the time for one complete revolution:
