Problem P. 4266. (September 2010)
P. 4266. The pulling force that an electric engine can exert when its speed is 57.6 km/h is 310 kN. The voltage is 3.6 kV, and the current in all the eight electric motors is 230 A. Determine the efficiency of the engine.
(3 pont)
Deadline expired on 11 October 2010.
Sorry, the solution is available only in Hungarian. Google translation
Megoldás. 75% a hatásfok.
Statistics:
213 students sent a solution.  
4 points:  Magyari Sarolt. 
3 points:  162 students. 
2 points:  23 students. 
1 point:  16 students. 
0 point:  1 student. 
Unfair, not evaluated:  10 solutions. 
