Class 12 NEET Physics Current Electricity Questions Part 1

For maximum current, the two batteries should be connected in series. The current will be maximum when externalresistance is equal to the total internal resistance of cells i.e. 2Ω. Hence power developed across the resistance R will be
I2R=(

2E

R+2r

)2 R=(

2×2

2+2

)2×2=2 W