Electrical Machines
In DC machine shape of main field flux distribution is?

 triangular
 saddle shape
 peaky in nature
 flat tapped or trapezoidal

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Electrical Machines
With the increase in speed of a DC motor

 both back emf as well as line current fall.
 back emf increases but line current falls.
 both back emf as well as line current increase.
 back emf falls and line current increases.

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