A dc shunt motor operating at an armature terminal voltage of 125 V is observed to be operating at a speed of 1180 r/min. When the motor is operated unloaded at the same armature terminal voltage but with an additional resistance of 5Ω in series with the shunt field, the motor speed is observed to be 1250 r/min. i. Calculate the resistance of the series field. ii. Calculate the motor speed which will result if the series resistance is increased from 5Ω to 15Ω.

Q: hotors a) What power is developed by a motor that turns at 1200 rpm and has a torque of 3.0 N-m?

A: Referring to question, the given information are: Speed of motor (s)=1200rpm. Torque (Ts)=3.0N-m.

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A: The solution is given below

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A: It is given that:

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Q: The DC shunt generator with the terminal voltage 375 V, armature drop 6 V and the each brush drop 4…

A: In this question , we will find generated emf in dc machine.

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.