A) \[\operatorname{n}>\sqrt{2}\]
B) n=1
C) n = 1.1
D) n=1.3
Correct Answer: A
Solution :
Current through the circuit \[\operatorname{I}=\frac{E+E}{{{r}_{1}}+{{r}_{2}}+R}=\frac{2E}{{{r}_{1}}+{{r}_{2}}+R}\] \[{{\operatorname{V}}_{1}}= 0\] (given) voltage across Ist cell is zero \[\operatorname{E}-I{{r}_{1}}=0\] \[\operatorname{E}=I{{r}_{1}}\] \[E=\frac{2E}{{{r}_{1}}+{{r}_{2}}+R}{{r}_{1}}\] from (1) \[E{{r}_{1}}={{r}_{1}}+{{r}_{2}}+R\] \[R={{r}_{1}}-{{r}_{2}}\]You need to login to perform this action.
You will be redirected in
3 sec