A) \[\frac{qBr}{E}\]
B) \[\frac{q{{B}_{0}}Br}{E}\]
C) \[\frac{qBr}{E{{B}_{0}}}\]
D) \[\frac{qBrE}{{{B}_{0}}}\]
Correct Answer: B
Solution :
Here, \[r=\frac{mv}{q{{B}_{0}}}\] or \[m=\frac{rq{{B}_{0}}}{v}\] As \[v=\frac{E}{B},\] \[\therefore \,\,m=\frac{q{{B}_{0}}Br}{E}\]
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