A) \[3.2\,\,W\]
B) \[8.2\,\,W\]
C) \[4\,\,W\]
D) \[2\,\,W\]
Correct Answer: D
Solution :
Key Idea: In parallel combination positive poles of all cells are connected to one point and negative poles to another point. The resistances of in are connected in parallel hence, equivalent resistance of combination is \[{{r}_{eq}}=\frac{1\times 1}{1+1}=0.5\] From Ohm?s law \[E=i(R+r)\] \[\therefore \] \[i=\frac{2}{0.5+0.5}=2\,\,A\] Power is given by \[P={{i}^{2}}R={{(2)}^{2}}\times 0.5=2W\]You need to login to perform this action.
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