A) 0.5 cm
B) 2.5 cm
C) 5.0 cm
D) 7.5 cm
Correct Answer: C
Solution :
\[\frac{m{{v}^{2}}}{r}=evB\] \[r=\frac{mv}{eB}\] \[\frac{{{r}_{2}}}{{{r}_{1}}}=\frac{{{v}_{2}}}{{{v}_{1}}}\] \[\frac{{{r}_{2}}}{2.5}=\frac{2v}{v}\] \[\Rightarrow \] \[{{r}_{2}}=5\,cm\]You need to login to perform this action.
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