In DC shunt motor if load is increased, the speed

Electrical Engineering XYZ MCQs

In DC shunt motor if load is increased, the speed:

  1. Remains constant
  2. Increased slightly
  3. Increase proportional
  4. Reduce slightly

Correct answer: 4. Reduce slightly

Explanation: DC shunt motors are known for their ability to maintain a nearly constant speed under varying loads. However, when the load on a shunt motor increases, there is a slight drop in speed. This occurs because the increased load leads to a small rise in armature resistance drop and a slight increase in the armature current. Consequently, the back electromotive force (EMF) decreases slightly, causing the motor to reduce its speed to balance the motor’s torque with the load torque. Thus, under increased load, the speed of a DC shunt motor reduces slightly.

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