A) 2 : 1
B) 4 : 1
C) 1 : 2
D) 1 : 1
Correct Answer: C
Solution :
\[P=\frac{{{V}^{2}}}{R}\Rightarrow \frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}=\frac{1}{2}\].
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