Question 118Electricity & Electronics - QMED
70% to passIf a short circuit in the armature of a DC motor occurs what would be the result?
Afail to start
Bhum when energized
Cspark at the brushes
Drun fast
AI Explanation
The correct answer is C) spark at the brushes. A short circuit in the armature of a DC motor would cause a high current flow, resulting in sparking at the brushes. This is because the short circuit bypasses the normal armature winding resistance, allowing excessive current to flow and create an arc at the brush-commutator interface. The other options are incorrect because: A) a short circuit would not prevent the motor from starting, B) humming is typically caused by other issues, and D) a short circuit would not make the motor run faster.
Related Questions
Q357:In the illustration, 1, 2, 3 and 4 are 12 volt batteries. What will be the nomin... Q426:In actual applications, electrical connections associated with 'R1, R2 and R3' o... Q110:The term "volt" describes: Q138:A capacitor is to be tested with a digital multimeter set up to measure ohms. If... Q69:The governor control switch of an alternator is moved to the 'raise' position. W...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources