A) 1 : 4
B) 4 : 1
C) 1 : 2
D) 2 : 1
Correct Answer: C
Solution :
[c] Electric power consumed by R is given by, \[{{P}_{1}}={{I}^{2}}R\] Electric power consumed by (2R) is given by, \[{{P}_{2}}={{I}^{2}}\times 2R\] \[\therefore \,\,\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{I}^{2}}R}{2{{I}^{2}}R}=\frac{1}{2}\]You need to login to perform this action.
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