21.A steel rod is used to make a magnetic device. At one end, a 30AWG wire is wrapped around the rod 150 revolutions (Coil A). At the other end two wires ar wound using the same wire gage to make coil B and coil C. Coil B is wound 300 revolutions and coil C is wound 75 revolutions. Coil A is energized by a 24Vrms, 50Hz power source. a. What is the ideal voltage output from coil B? b. What is the ideal voltage output from coil C? c. What is the factor that is used to define the degree of transfer between the coils?

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Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.