1.

According to Joule's law of heating, heat produced \[H={{I}^{2}}\]Rt, where I is current, R is resistance and t is time. If the errors in the measurement of I, R and t are 3%, 4% and 6% respectively then error in the measurement of H is   

A.            \[\pm \]17%                             
B.            \[\pm \]16%
C.            \[\pm \]19%                             
D.            \[\pm \]25%
Answer» C.            \[\pm \]19%                             


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