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Explain fractional slot winding and related calculations?
here spp(slots per pole per phase)is a frictional no. it is a double layer winding while m=s/3p is non integer in a frictional slot winding.
How high is a tree that cast a 24ft shadow at the same time an 8ft pole cast a shadow which is 12ft long?
For pole: ratio of shadow to pole = 12/8 = 1.5 So, for tree, ration = 1.5 24/H = 1.5 so H = 24/1.5 = 16 ft
How do you measure the diameter of a metal pole?
You could use a pair of calipers. Alternatively, measure its circumference using a piece of string and divide the measure by pi.
How can you travel 3 miles south and then 3 miles east and then 3 miles north and be at your starting place?
You can start near the South Pole - 3 miles North of any point on a latitude that encircles the earth an integer number of times in 3 miles; or you can start at the North Pole.
A building casts a 7.5m shadow at the same time that a 40m pole casts a shadow of 3m. How high is the building?
Ratio of shadows = 3m:7.5m :: 1:2.5 So, the ratio of the heights (in the same order) is 1:2.5 ie Ht(Pole):Ht(Building) = 40m:Ht(Building) = 1:2.5 So Ht(Building) = 2.5*40m = 100 metres
