We are given a circuit diagram and asked to determine which logic gate it represents.

1. Problem Description

We are given a circuit diagram and asked to determine which logic gate it represents.

2. Solution Steps

The circuit consists of a resistor $R$, a switch $A$, a battery, and a light bulb $Q$. If the switch $A$ is open, the circuit is complete and the light bulb $Q$ will light up. If the switch $A$ is closed, the circuit is shorted, and the light bulb $Q$ will not light up. Thus, the output $Q$ is the inverse of the input $A$. This corresponds to a NOT gate.

3. Final Answer

(1) NOT