How is an OR logic circuit constructed?

An OR logic circuit is designed to output a true signal when at least one of its inputs is true. This is achieved by connecting two or more normally open (N.O.) switches in parallel. When any of these switches are closed (activated), the circuit allows current to flow, thus providing a true output. This arrangement effectively mirrors the function of an OR gate in digital logic, where the presence of a true condition from any input results in a true output.

In this context, using normally open switches in parallel ensures that if any switch is turned on, the circuit is completed, leading to the desired output. Therefore, the construction of the OR logic circuit with N.O. switches is fundamental to its functionality in logic applications, making it the correct choice.