List of top Electrical and Electronic Measurements Questions

The maximum possible speeds in rpm at which an alternators can be driven to generate voltages at 60 Hz and 50 Hz are, respectively:

Assume the incremental cost characteristics of two generates delivering 250MW as.
\(\frac{dF_1}{dP_1} = 20 +0.01P_1\)
\(\frac{dF_2}{dP_2} = 14 +0.2P_1\)
For economic operation, the generation P₁ and P₂ should be: