Question 352Electricity & Electronics - QMED

The correct answer is C) 80 RPM. To determine the speed of the propeller, we need to use the relationship between the number of poles in the generator and the number of poles in the propulsion motor. The formula is: Generator RPM x (Generator Poles / Motor Poles) = Propeller RPM. In this case, the generator has 4 poles and the propulsion motor has 160 poles. Plugging in the values, we get: 3,200 RPM x (4 / 160) = 80 RPM. This calculation shows that the current speed of the propeller is 80 RPM. The other options are incorrect because they do not match the calculated result based on the provided information.