A) four times
B) doubled
C) halved
D) squared
Correct Answer: A
Solution :
We know that \[L\propto {{N}^{2}}\] Hence, \[\frac{{{L}_{1}}}{{{L}_{2}}}={{\left( \frac{{{N}_{1}}}{{{N}_{2}}} \right)}^{2}}\] or \[\frac{{{L}_{1}}}{{{L}_{2}}}={{\left( \frac{{{N}_{1}}}{{{N}_{2}}} \right)}^{2}}\] or \[{{L}_{2}}={{\left( \frac{2}{1} \right)}^{2}}{{L}_{1}}=4{{L}_{1}}\]
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