A) 8 times
B) 4 times
C) 2 times
D) 16 times
Correct Answer: B
Solution :
(b) 4 times. As \[Bqv==\frac{m{{v}^{2}}}{r}\] or \[r=\frac{mv}{Bq}\] According to the question, \[v'=2v\] and \[B'=\frac{B}{2}\] \[\therefore r'\frac{mv'}{B'q}=\frac{m(2v)}{(B/2)q}=\frac{4mv}{Bq}=4r\]You need to login to perform this action.
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