A) 1.1 cm
B) 1.1 mm
C) 1.1 m
D) 11 cm
Correct Answer: A
Solution :
\[r=\frac{mv}{eB}\] \[=\frac{v}{\left( \frac{e}{m} \right)B}\] \[\therefore \] \[r=\frac{2\times {{10}^{7}}}{1.76\times {{10}^{11}}\times 2\times {{10}^{-2}}}\] \[\Rightarrow \] \[r=0.0056m\] \[\therefore \] \[D=2r\approx 0.011m\] \[D=1.1\,cm\]You need to login to perform this action.
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