Question 118Electricity & Electronics - QMED

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.