Question

How to do this problem. A generator receives 7hp and supplies 20a at 220v. Find the power supplied by the generator and its efficiency.

Answer 1

We know that electrical power is given by:\[P_e = IV ~[{\rm W}]\]Efficiency is given as:\[\eta = {\rm output \over input}\]We need to convert horse power into Watts. Note that \[1~ hp = 745.7 ~Watts\]