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Answer: b
Explanation: The winding factor may be initially assumed as 0.955. It is the value of winding factor for infinitely distributed winding with full pitch coils.
The initial assumption for the value of winding factor in electrical machines, such as motors and generators, generally tends to be in the range of 0.85 to 0.95 for most practical designs. This is not a fixed value but rather a commonly accepted range that accounts for the effects of harmonics and the distribution and pitch of the windings. The winding factor, also known as the winding pitch factor or coil pitch factor, is crucial for estimating the effective number of turns in the winding and impacts the machine’s efficiency and performance. It is a product of two factors: the distribution factor (or breadth factor) and the pitch factor (or coil span factor). Calculations for specific machines can lead to slightly different values within or sometimes even outside this range, depending on the specific winding arrangement and design objectives.