Physics - Semiconductors Question with Solution | TestHub

Let's assume that when the path is short, the state is called state $1$ and when it is open, the state is called state $0$.

Depending up on whether the path is short or not in the circuit, the following table can be obtained:

$\mathrm{A}$	$\mathrm{B}$	$\mathrm{Out}$
$1$	$1$	$0$
$1$	$0$	$0$
$0$	$1$	$0$
$0$	$0$	$1$

The above table is similar to the truth table corresponding to $\mathrm{NOR}$ gate. Hence, the circuit indicates a $\mathrm{NOR}$ logic gate.