(electron's charge \[=1.6\times {{10}^{19}}C,\] mass of electron \[=9.1\times {{10}^{31}}\text{ }kg\]) |
![]() |
A) 12.87 cm
B) 1.22 cm
C) 11.65 cm
D) 2.25 cm
Correct Answer: A
Solution :
\[R=\frac{m\text{v}}{qB}\]\[=\frac{\sqrt{2m(K.E.)}}{qB}\] \[R=\frac{\sqrt{2\times 9.1\times {{10}^{-31}}\times (100\times 1.6\times {{10}^{-19}})}}{1.6\times {{10}^{-19}}\times 1.5\times {{10}^{-3}}}\] \[R=2.248cm\]You need to login to perform this action.
You will be redirected in
3 sec