Question 118Electricity/Electronics - QMED70% to pass
If a short circuit in the armature of a DC motor occurs what would be the result?
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
#116 What would excessive sparking at the brushes of a running DC motor be an indication of? #117 In addition to improper brush pressure or seating, what can result in excessive sparking at the brushes of a DC propulsion motor? #119 An open in the armature of a DC motor is suspected, but is not found by visual inspection of the commutator. What would be the next step in troubleshooting this problem? #120 Which of the listed colors properly describes a DC motor commutator when correct commutation is taking place? #121 What can insufficient brush pressure on a DC motor cause?