Current Electricity and Electrical InstrumentHard

Question

Two identical batteries, each of emf 2V and internal resistance r = 1Ω are connected as shown. The maximum power that can be developed across R using these batteries is :-
      

Options

A.3.2 W
B.8.2 W
C.2 W
D.4W

Solution

         
Given circuit can be redraw as
for max power, R = Ω
P = I2 R =   = 2 watt

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