# Which DC motor has the least percentage increase in Input current for the same percentage increase in torque?

Which DC motor has the least percentage increase in Input current for the same percentage increase in torque?

### Right Answer is:

Series motor

#### SOLUTION

- In DC series motor both field and armature windings carry the same current from the source as both are connected in series.
- Therefore torque is directly proportional to the product of current in field and armature windings.
- For a given source current the torque produced is square of this current. So, even there is low current change, the torque change is great.