Electrical Engineering XYZ MCQs

In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch:

- 1
- 50
- 10
- 100

Correct answer: 3. 10

Explanation:

To find the average pitch in a lap winding DC machine, we use the formula:

Average Pitch = Total Number of Conductors/Number of Parallel Paths

Given: Total Number of Conductors = 100 Number of Parallel Paths = 10

Using the formula:

Average pitch = 100/10 = 10

So, the average pitch is 10. Therefore, the correct answer is option 3: 10.

- The average pitch in a lap winding is the distance in terms of number of conductors between the beginning of one pole to the beginning of the next pole under a single coil.
- In lap winding, all the conductors under each pole are connected in series, forming a loop, and there are multiple such loops in parallel, depending on the number of parallel paths.
- The average pitch represents the average distance between the starting points of these loops, which in this case is 10 conductors.