In the specified test, which reading indicates a good armature?

A good armature in an electrical context, such as in a motor or generator, typically should not have internal short circuits or low resistance paths that would impair its performance. When conducting a resistance test on the armature windings, infinite ohms indicates that the winding is intact with no conductive path, meaning there are no shorts between the windings or to the armature itself. This high resistance ensures that the electrical current flows through the designed paths intended for operation, allowing for efficient performance and preventing damage.

In practice, low resistance could suggest a short circuit, while zero ohms would indicate a complete short, which is detrimental to the functioning of the armature. High resistance could indicate potential problems, such as degraded windings or impending failure, but would not necessarily confirm the armature’s integrity. Thus, the reading of infinite ohms signifies optimal conditions for the armature, ensuring that it is functioning properly without any electrical faults.