Question

The bubbled OR gate is equivalent to _____ gate.
a) NAND
b) NOR
c) NOT
d) AND

Answer 1

Hint: Logic gates are an essential concept in electronics. These are virtual digital devices that are primarily based on the Boolean function. Logic gates carry out logical operations on individual or many binary inputs and give one binary product. In easy terms, logic gates are the automatic circuits in a digital system.

Complete answer:
Logic gates have many applications, but they are primarily based on their operations or truth table. Basic logic gates are usually found in circuits such as a safety thermostat, automatic watering system, push-button lock, light-activated burglar alarm, and various other electronic devices.
A bubbled OR gate contains two NOT gates from which input changes into bar of input and one OR gate which gives output as a sum of both inputs.

First, NOT gate will change the inputs. Then, sum of inputs will be obtained at the output due to AND gate.

$Y=\overline{A}+\overline{B}$
$Y=\overline{A}\cdot \overline{B}$ (By De-Morgan’s Theorem)
This expression resembles the output of a NAND gate.
Option (a) is correct.

Note: One of the initial benefits is that fundamental logic gates can be utilized in various combinations if the operations are high-level. Besides, there is no boundary to the number of gates used in a single device. However, it can be limited due to the given physical place in the device.