8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots, each slot containing 8 conductors. The flux per pole is 20 mWb and the current taken by the motor is 25 A. The resistances of armature and field circuit are 0.1 Q and 125 N respectively. If the rotational losses are 810 watt. Find the developed torque and useful torque of the machine.

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Q8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected.
There are 120 slots, each slot containing 8 conductors. The flux per pole is 20
mWb and the current taken by the motor is 25 A. The resistances of armature
and field circuit are 0.1 2 and 125 N respectively. If the rotational losses are
810 watt. Find the developed torque and useful torque of the machine.
Transcribed Image Text:Q8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots, each slot containing 8 conductors. The flux per pole is 20 mWb and the current taken by the motor is 25 A. The resistances of armature and field circuit are 0.1 2 and 125 N respectively. If the rotational losses are 810 watt. Find the developed torque and useful torque of the machine.
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