Question

a battery of internal resistance 4 ohm is connectiong to the network of resistance as shown in figure. in order that maximum power is delivered to the network the value of R in ohm shoulder be

Answer 1

Use formula I=E/R^2 where R = Req  

Answer 2

it is a wheatstone bridge ques. , so the middle 6ohm will get cancelled , and the eq. resistance will be 2R and for max. power it should be equal to internal resistance so 2R =4
so R = 2 ohm.

hope u like it..
be happy