A) \[\frac{\upsilon }{sd}\]
B) \[\frac{2\upsilon }{sd}\]
C) \[\frac{\upsilon }{2sd}\]
D) \[\frac{\upsilon }{4sd}\]
Correct Answer: A
Solution :
Let the radius of trajectory of the particle be R For the particle not to hit the wall \[R\le d\Rightarrow \frac{mv}{qB}\le d\] \[\therefore \] \[B\ge \frac{mv}{qd}=\frac{v}{sd}\Rightarrow {{B}_{\min }}=\frac{v}{sd}\] Hence, the correction option is (a).You need to login to perform this action.
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