A) \[\text{28}{{\,}^{\text{o}}}\text{C}\]
B) \[\text{48}{{\,}^{\text{o}}}\text{C}\]
C) \[\text{52}{{\,}^{\text{o}}}\text{C}\]
D) \[68{{\,}^{\text{o}}}\text{C}\]
Correct Answer: D
Solution :
\[{{i}^{2}}Rt=ms\Delta t\] \[\Rightarrow \]\[{{(4)}^{2}}\times 7\times 3\times 60=0.1\times 4.2\times {{10}^{3}}\] \[\times \,[T-(20\,+273)]\] \[T=341\,K=68{{\,}^{o}}C\]You need to login to perform this action.
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