Question

Which line shows the path of beta radiation in a magnetic field?

• A. A
• B. B
• C. C
• D. D
• E. E

Answer 1

Answer: (D)

D

If magnetic field is directed ,perpendicularly inward the plane of paper then being negative , beta particle would experience a force towards right to the line $A$ (according to Fleming's left hand rule) and as it is lighter than alpha particle therefore it will be deflected more due to magnetic force and go through the line $E$ , and if the direction of magnetic field is perpendicularly outward the plane of paper , alpha particle will go through the line $D$.