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 10 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:
C
Time period of one revolution of proton, 
Here, 
mass of proton
Linear distance travelled in one revolution, 
Here, 
velocity of proton)
Length of region, 
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