Question

1. which of the following best describes a normally closed switch? a a switch that cannot be opened. b a switch that once closed remains closed until it is unlatched by a voltage. c a switch that remains open until manually closed d a switch that remains closed until manually opened

Explanation:

A normally - closed switch is in the closed state in its default or resting condition and remains that way until some external action (such as manual operation) opens it.

Answer:

D. A switch that remains closed until manually opened