Hydraulic efficiency of Francis turbine is
1
Directly proportional to velocity of whirl at inlet and inversely proportional to net head on turbine
2
Directly proportional to velocity of whirl at inlet and net head on turbine
3
Inversely proportional to velocity of whirl at inlet and net bead on turbine
4
Inversely proportional to velocity of whirl at inlet and directly proportional to net head on turbine