How should cells be joined to obtain a maximum current ? Choose the correct option. 1.In series 2.In Parralel 3.Mixed Combination 4.In any combination
Every voltage cell has an internal resistance R. To obtain the maximum current from joined cells means to find group them together is such a way that the resulting internal resistance is minimised.
1. The series grouping provides maximum internal resistance for the group (`R_(eq) = R +R +R+... ` , or `R_(eq) =n*R` )
2.The parallel grouping provides the minimum internal resistance for the group (`1/R_(eq) =1/R +1/R +1/R +...` , or `R_(eq) =R/n` )
3.The mixed combination grouping provides an intermediate value for the resistance of the group between the maximum and minimum values found above.
4. Because as shown above there is a maximum and minimum value for the equivalent total resistance `R_(eq)` this choice is not correct.
Therefore the correct answer is 2) In parallel.