A) \[R\text{ }=\text{ }{{r}_{1}}+{{r}_{2}}\]
B) \[R\text{ }=\text{ }{{r}_{1}}/{{r}_{2}}\]
C) \[R\text{ }=\text{ }{{r}_{1}}-{{r}_{2}}~\]
D) \[R\text{ }=\text{ }{{r}_{2}}/{{r}_{1}}\]
Correct Answer: C
Solution :
\[I\,\,=\,\,\frac{E+E}{{{r}_{1}}+{{r}_{2}}+R}\,\,=\,\,\frac{2E}{{{r}_{1}}+{{r}_{2}}+R}\] \[V=E-I{{r}_{1}}=0\,\,\,\Rightarrow \,\,E=I{{r}_{1}}\]You need to login to perform this action.
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