question_answer

In the above question, if the internal resistance of the battery is 1 ohm, then what is the reading of ammeter

A)                    5/3 A

B)                                      40/29 A

C)                    10/9 A                             

D)            1 A

Correct Answer: B

Solution :

           Applying Kirchhoff law in the first mesh                    \[10=5{{i}_{1}}+i\]              .....(i) Applying  in the second mesh \[5{{i}_{1}}=4i-4{{i}_{1}}\]                  ......(ii) Solving equation (i) and (ii), we get \[{{i}_{1}}=\frac{40}{29}\,A\]