The circuit uses two input switches A and B, two resistors and an LED, as shown. What Boolean operation does LED output Y represent?
Options

Question

The circuit uses two input switches A and B, two resistors and an LED, as shown. What Boolean operation does LED output Y represent?

G1 Physics · Accepted Answer

The circuit configuration makes the LED on (logic 1) for all input combinations except when both inputs provide logic 1. Therefore its output truth values are (00→1,01→1,10→1,11→0), the NAND truth table. Final answer: Option B.