Q.

In DC motor, which of the following part can sustain the maximum temperature rise?

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a

Commutator

b

Slip rings

c

Armature winding

d

Field winding

answer is A.

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Detailed Solution

Maximum temperature rise can be sustained by field winding, as it is not involved in rotary parts. Field winding is present away from rotary parts of the machine, so temperature rise in the machine will not produce any effect in machine rotations.

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