Question

In the circuit below, $A$ and $B$ represent two inputs and $C$ represents the output.
The circuit represents

• A. $\text{NOR gate}$
• B. $\text{AND gate}$
• C. $gate$
• D. $\text{OR gate}$

Answer 1

The correct option is D $\text{OR gate}$

Given, $A$ and $B$ are inputs and $C$ is output.

Assume that some voltage is applied across $AB,$

If the voltage is positive, then diode corresponding to $A$ will be on and the other diode will be off

$\Rightarrow C=A$

If the voltage is negative then diode corresponding to $B$ will be on and the other diode will be off

$\Rightarrow C=B$

Therefore we can say that $C=AorB$

Therefore it acts like $OR$ gate.

So the correct option is $D.$