What type of circuit logic requires multiple switches to be closed before energizing a load?

The type of circuit logic that requires multiple switches to be closed before energizing a load is known as AND logic. In AND logic, all specified conditions must be satisfied for the output to be activated. This means that if you have two or more switches in an AND configuration, every switch must be in the closed position simultaneously to allow current to flow and energize the load.

For example, consider a situation where you have two switches controlling a light; if both switches are open, the light will not turn on. It's only when both switches are closed that the circuit becomes complete, and the load (the light) is energized. This characteristic of requiring all conditions to be true is the defining feature of AND logic.

In contrast, OR logic would only require a single switch to be closed for the load to energize, while NOR logic requires all switches to be open. NAND logic, on the other hand, energizes the load unless all the switches are closed. Thus, the necessity of multiple switches to be closed for circuit operation aligns specifically with AND logic.