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

 saddle shape
 triangular
 peaky in nature
 flat tapped or trapezoidal

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Electrical Machines
In a DC machine

 current and emf in armature are unidirectional
 current and emf in armature are alternating.
 current and emf at the terminals are alternating.
 emf in armature conductors and at the terminals is alternating.

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