A hydro-electric station has to operate with a mean head of 250 m and is supplied from a reservoir lake which drains a catchment area of 120 km2. the available rain off is 50% with annul rainfall of 100 cm .if plant capacity factor for the station is 80%. Find the average power produced and capacity of power station should be designed. assume the efficiency of plant   .7 0%

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Maximum power transfer theorem

A resistive load will consume maximum power from a network when the load resistance is equal to the resistance of the network as viewed from the open-circuit terminals, with all energy sources removed leaving only the internal resistances. Physicist Moritz von Jacobi introduced the maximum power transfer theorem in 1940. Therefore, this theorem is also known as Jacobi's law.