Which element describes two normally closed switches in series?

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Multiple Choice

Which element describes two normally closed switches in series?

Explanation:
Two normally closed switches in series implement a NOR function for the two input signals. Each normally closed contact is closed when its associated input is not actuated. In series, the current path remains closed only if both inputs are not actuated. If either input becomes actuated, its contact opens and the path is broken, turning the output off. Therefore the circuit conducts only when neither input is active, which is the NOT of (A OR B) = NOR.

Two normally closed switches in series implement a NOR function for the two input signals. Each normally closed contact is closed when its associated input is not actuated. In series, the current path remains closed only if both inputs are not actuated. If either input becomes actuated, its contact opens and the path is broken, turning the output off. Therefore the circuit conducts only when neither input is active, which is the NOT of (A OR B) = NOR.

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