MCQ
Armature current in dc motor will be maximum when
- AMotor has acquired maximum speed
- BMotor has acquired intermediate speed
- ✓Motor has just started moving
- DMotor is switched off
✓
Answer
Correct option: C.
Motor has just started moving
c
(c)Motor e.m.f. equation ${E_b} = V - {I_a}{R_a}$
(c)Motor e.m.f. equation ${E_b} = V - {I_a}{R_a}$
At starting ${E_b} = 0,$ so ${I_a}$will be maximum.
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