A) \[9{}^\circ C\]
B) \[18{}^\circ C\]
C) \[27{}^\circ C\]
D) \[36{}^\circ C\]
Correct Answer: B
Solution :
According to the question, \[{{i}^{2}}RT=m\,c\Delta t\] \[\Delta T\propto i\] \[\frac{\Delta {{T}_{1}}}{\Delta {{T}_{2}}}={{\left( \frac{{{i}_{1}}}{{{i}_{2}}} \right)}^{2}}={{\left( \frac{{{i}_{1}}}{3{{i}_{1}}} \right)}^{2}}=\frac{1}{9}\] \[\Delta {{T}_{2}}=9\Delta {{T}_{1}}\] \[=9\times 2\] \[=18\,{}^\circ C\]
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