The figure shows a region of length 
with a uniform magnetic field of 
in it and a proton entering the region with velocity 
making an angle 
with the field. If the proton completes 
revolution by the time it cross the region shown 
, is close to (mass of proton 
, charge of the proton 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
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