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A large series motor is never started without some load on it, otherwise
  • a)
    it draws very heavy current
  • b)
    it develops excessive speed and get damaged
  • c)
    it results in heavy sparking at the brushes
  • d)
    circuit gets open circuited
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A large series motor is never started without some load on it, otherwi...
In case of DC series motor, field generated depends on armature current. At no load, current drawn is very less hence the field generated is less. Since the back emf remains constant hence speed is inversely proportional to the flux. Thus the initial speed will get very high and the motor may get damaged at no load.
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A large series motor is never started without some load on it, otherwisea)it draws very heavy currentb)it develops excessive speed and get damagedc)it results in heavy sparking at the brushesd)circuit gets open circuitedCorrect answer is option 'B'. Can you explain this answer?
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