DC Generators
The armature of a dc machine having 10 poles is rotating at a speed of 10 revolution per second. The number of hysteresis loops formed per second is ______

10
150
50
100

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DC Generators
Wave winding is composed of

That even number which is exact multiple of poles
Any even number of conductors
Any odd number of conductors
That even number which is exact multiple of poles + 2

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