A) \[\frac{1}{2}\]
B) 1
C) 2
D) 4
Correct Answer: C
Solution :
\[B\propto \frac{1}{r}\Rightarrow \frac{{{B}_{1}}}{{{B}_{2}}}=\frac{{{r}_{2}}}{{{r}_{1}}}=\frac{2r}{r}=2\]You need to login to perform this action.
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