In ladder logic, a normally open (NO) contact represents a condition that is closed when its input is true; how does it affect the coil?

In ladder logic, a normally open (NO) contact represents a condition that is closed when its input is true; how does it affect the coil?

• A. It is closed when its input is false, energizing the coil.
• B. It is open when its input is true, energizing the coil.
• C. It is closed only when its input is true, and when closed it energizes the coil.
• D. It is closed regardless of input, energizing the coil.

Answer: (C)