A) 2:1
B) 1:2
C) 1:4
D) 4:1
Correct Answer: A
Solution :
\[P=\frac{{{V}^{2}}}{R}\Rightarrow P\propto \frac{1}{R}\]and \[R\propto l\] \[\therefore \] \[P\propto \frac{1}{l}\Rightarrow \frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{l}_{1}}}{{{l}_{2}}}=\frac{2}{1}\]You need to login to perform this action.
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