What is the resultant pitch in a lap winding____________?
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Answer: D. difference of front and back pitches
Explanation
In a lap winding configuration, the resultant pitch represents the net distance between consecutive coil connections. This key winding parameter is calculated directly by taking the numerical difference between front and back pitches. Subtracting front pitch from back pitch ensures the winding progresses correctly around the cylindrical armature core. Armature winding pitches define how individual coil sides connect to commutator segments and other adjacent coils. Back pitch measures the coil span on the back side of the armature core in terms of coil sides. Front pitch measures the connection distance between coil ends on the commutator end of the machine.
Option A is incorrect because multiplying front and back pitches does not yield the proper net winding progression. Option B is wrong since dividing front pitch by back pitch produces a dimensionless ratio rather than a coil pitch. Option C describes wave winding characteristics where pitches are added rather than subtracted to advance the winding.
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- Engineering
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- Electrical Engineering
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