TS EAMCET 7 May 2018 Shift 1 Solved Paper

A cell of emf 10V and internal resistance 3 Ω is connected in parallel with another cell of emf 7 V Fand internal resistance

3

5

Ω such that their positive terminals are joined togetherand so are then negative terminals. Their positive terminals are joined with the negative terminal and their negative terminal is joined with the positive terminal of a third cell of emf 20 V with internal resistance 2 Ω . The combination can be replaced by a battery of emf E and internal resistance r, then the values of E and are respectively