The current drawn by the armature of DC motor is directly proportional to

by

Electrical Engineering XYZ MCQs

The current drawn by the armature of DC motor is directly proportional to:

  1. The torque required
  2. The voltage across the terminals
  3. The speed of motor
  4. None of the above

Correct answer: 1. The torque required

Explanation: In a DC motor, the torque produced by the motor is directly proportional to the armature current (T ∝ Ia). When more torque is needed to drive a load, the armature draws more current. The relationship is based on the equation T = kΦIa, where T is the torque, k is a constant, Φ is the flux, and Ia is the armature current. Voltage and speed do not have a direct proportional relationship with the current drawn; instead, they are related through other factors such as the motor’s back EMF and resistance.

Leave a Reply