If a short circuit in the armature of a DC motor occurs what would be the result?

Correct Answer: Option C — spark at the brushes

An armature short circuit creates a low-resistance path, causing excessive current to flow through the faulted coils. This results in severe localized heating and significant sparking at the brushes as the shorted coils pass through the neutral zone, disrupting the commutation process and potentially causing catastrophic failure of the armature windings.