A 220 V DC motor having armature resistance of 0.7 Ω and back emf of 190 V will draw current – DC Machines MCQ#14

A 220 V DC motor having armature resistance of 0.7 Ω and back emf of 190 V will draw current:

  1. 36.92 A
  2. 42.85 A
  3. 53.64 A
  4. 68.55 A

Correct answer: 2. 42.85 A

Explanation: Current drawn = (V – Eb)/R = (220 – 190) / 0.7 Ω = 42.85 A

So a 220 V DC motor having armature resistance of 0.7 Ω and back emf of 190 V will draw current 42.85 Amps of current

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