Physics · JEE | Current Electricity

Referring to the parallel combination of cells shown in the figure, if two identical cells each of emf \( \varepsilon \) and internal resistance \( r \) are connected in parallel with their positive terminals joined together, the equivalent emf \( \varepsilon_{eq} \) and equivalent internal resistance \( r_{eq} \) are:

1. A
   \( \varepsilon_{eq} = \frac{\varepsilon}{2}, r_{eq} = \frac{r}{2} \)
2. B
   \( \varepsilon_{eq} = 2\varepsilon, r_{eq} = 2r \)
3. C
   \( \varepsilon_{eq} = \varepsilon, r_{eq} = 2r \)
4. D
   \( \varepsilon_{eq} = \varepsilon, r_{eq} = \frac{r}{2} \)