The abbreviations NO (normally open) and NC (normally closed) represent the electrical state of switch contacts when:

A) power is applied.
B) power is not applied.
C) the switch is actuated.
D) the switch is not actuated.

Normally Open

Describes a switch or relay contact that is in a default open state, allowing current to flow only when the contact is actuated to close.

Normally Closed

A term referring to an electrical switch or circuit state where the contacts are closed (allowing current flow) when no actuating force is applied.

Electrical State

An electrical state refers to the condition of an electrical component or system, such as being charged, discharged, on, or off.