A) 4 : 1
B) 1 : 4
C) 2 : 1
D) 1 : 2
Correct Answer: C
Solution :
\[U=\frac{{{F}^{2}}}{2k}\]Þ \[\frac{{{U}_{1}}}{{{U}_{2}}}=\frac{{{k}_{2}}}{{{k}_{1}}}\] (if force are same) \ \[\frac{{{U}_{1}}}{{{U}_{2}}}=\frac{3000}{1500}=\frac{2}{1}\]
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