N a hydroelectric installation, a turbine delivers 1500 hp to a generator, which in turn transfers 80.0% of the mechanical energy out by electrical transmission. Under these conditions, what current does the generator deliver at a terminal potential difference of 2160 V?

I=414.27 A

Explanation:

Given that

Turbine power ,P = 1500 hp

Mechanical efficiency ,η = 80 %

Voltage difference ,ΔV = 2160 V

lets take power receive by generator = P '

P'=\eta \times P

P'= 0.8\times 1500 hp

P'= 1200 hp                                  ( 1 hp = 745.7 W)

P'= 894839.8 W

Lets take current pass trough generator binding  = I

P ' = ΔV I

I=414.27 A