A) \[{{5}^{o}}C\]
B) \[{{10}^{o}}C\]
C) \[{{20}^{o}}C\]
D) \[{{40}^{o}}C\]
Correct Answer: C
Solution :
Using conservation of energy Supplied electric energy = absorbed heat energy Þ \[{{i}^{2}}Rt=mST\] Þ \[T\propto {{i}^{2}}\] (T - change in temperature) i.e. when i is doubled T will be four times i.e. \[5\times 4={{20}^{o}}C\]
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