Question

N cells each of e.m.f. E & identical resistance r are grouped into sets of K cells connected in series. The (N/K) sets are connected in parallel to a load of resistance R, then

• A. Maximum power is delivered to the load if $K=\frac{NR}{r}$
• B. Maximum power is delivered to the load if $K=\frac{r}{NR}$
• C. Maximum power is delivered to the load is $\frac{E^2}{4Nr}$
• D. Maximum power is delivered to the load is $\frac{N{E}^2}{4r}$

Answer 1

The correct option is A Maximum power is delivered to the load if $K=\frac{NR}{r}$

Therefore K = r/NR