1.

The temperature gradient in a rod of 0.5 m long is \[{{80}^{o}}C/m\]. If the temperature of hotter end of the rod is\[{{30}^{o}}C\], then the temperature of the cooler end is

A. \[{{40}^{o}}C\]  
B. \[-{{10}^{o}}C\]
C.   \[-4\hat{i}+6\hat{j}\]
D. \[{{0}^{o}}C\]
Answer» C.   \[-4\hat{i}+6\hat{j}\]


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