1. The problem statement, all variables and given/known data My textbook says that the power delivered by the battery to external resistance network will be maximum when the external resistance equals the internal resistance? Why is it so? p = I^2 * R, so greater the external resistance, greater the power(even if it exceeds internal resistance) 2. Relevant equations P = VI ;) 3. The attempt at a solution Clueless about this one.