Question

When speed of a dc motor increases, the armature current:

• A. Increases
• B. Decreases
• C. Does not change
• D. Increases and decreases continuously

Answer 1

The correct option is A Increases

The speed of a dc motor is changed by changing the current in the field or by changing the current in the armature. When the field current is decreased, the field flux is reduced, and the counter emf decreases. This permits more armature current. Therefore, the motor speeds up.