Calculate the speed of D.C. series motor.

Q.  A 4 pole 240 V, d.c. series motor has a wave wound armature with 180 conductors. The armature resistance and the field winding resistance are 0.10 ohm and 0.2 ohm respectively. If the motor is drawing 40 A current at 0.015 Wb  flux per pole, then the speed under this condition is
- Published on 23 Oct 15

a. 2533.3 rpm
b. 2644.4 rpm
c. 2756.9 rpm
d. 2987.6 rpm

ANSWER: 2533.3 rpm

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