A) 2 L
B) L
C) 4 L
D) L/2
Correct Answer: A
Solution :
\[\because \,\,\,\,\,\,\,L\propto {{N}^{2}}r;\,\,\,\frac{{{L}_{1}}}{{{L}_{2}}}={{\left( \frac{{{N}_{1}}}{{{N}_{2}}} \right)}^{2}}\times \frac{{{r}_{1}}}{{{r}_{2}}}\] \[\Rightarrow \,\,\,\,\,\,\,\,\frac{L}{{{L}_{2}}}={{\left( \frac{1}{2} \right)}^{2}}\times \left( \frac{r}{r/2} \right)=\frac{1}{2};\,\,\,\,{{L}_{2}}=2L\]You need to login to perform this action.
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