. A proton a deuteron and an alpha
particle are projected perpendicular to the direction of a uniform magnetic field with same kinetic energy. The ratio of the radii of the circular paths described by them is
A: √(2) :1:√(2)
B: 1:√(2) :1
C: √(2) :√(2) :1
D: √(2) :1:1
When particle is moving perpendicular to a magnetic field, then it moves in circular path of radius.
The ratio of the radii of the circular paths described by them is given by option B. (1:√2:1)