A) \[{{r}_{1}}+{{r}_{2}}\]
B) \[\frac{{{r}_{1}}}{{{r}_{2}}}\]
C) \[{{r}_{1}}-{{r}_{2}}\]
D) \[{{r}_{1}}\,\,{{r}_{2}}\]
Correct Answer: C
Solution :
\[i=\frac{2E}{R+{{r}_{1}}+{{r}_{2}}}\] \[i{{r}_{2}}+iR=E\] \[2{{r}_{2}}+2R=R+{{r}_{1}}+{{r}_{2}}\] or \[R={{r}_{1}}-{{r}_{2}}\]You need to login to perform this action.
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