A) 4.35 cal
B) 5.73 cal
C) 7.5 cal
D) 2.5 cal
Correct Answer: C
Solution :
From Joules law, for a current carrying conductor at a definite temperature the rate of production of heat is given by \[H=Vit\] where\[i\]is current, V the potential difference and t the time. Given, \[V=15\text{ }volt,\text{ }i=2.1\text{ }A,\text{ }t=1s\] \[\therefore \] \[H=15\times 2.1\times 1=31.5\,J\] Also, \[1\text{ }cal=4.2\text{ }J\] \[\therefore \] \[H=\frac{31.5}{4.2}=7.5\,cal\]You need to login to perform this action.
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