What is a characteristic of Form A contacts?

Form A contacts are characterized by their normally open state, meaning they close when the energizing force is applied. This design allows the contacts to complete a circuit when power is supplied, which is essential in various applications that rely on this functionality for operational control.

The nature of Form A contacts makes them suitable for situations where you want a device or circuit to turn on when activated and turn off when the power is removed. This ability to respond to energization is fundamental in control systems, relays, and a variety of other electronic components where an action is required to be triggered by an external signal.

While other options touch on different characteristics or applications, they do not accurately reflect the behavior of Form A contacts, which specifically operate as described.