Digital Electronics MCQ Level - 2 - Physics MCQ

 can be implemented through the following diagram,

Which requires 2 AND gate, 1 OR gate and two inverters The correct answer is: two AND gates, one OR gate and two inverter

The correct answer is: 

A NAND gate is a universal logic gate that performs the negation (NOT) of an AND logic operations in digital circuits. 
As we know, 
Y = 2ⁿ 
Y number of Entries in the truth table Where, n = number of inputs.

The algebraic expression of half-adder are


The correct answer is: two inputs and two outputs

If either V₁ is positive or V₂ is positive, V₀ be positive, otherwise we get a low output for both V₁ and V₂ negative. Hence it acts as an OR gate.
The correct answer is: OR gate for a negative logic system

When A is high and B is low i.e. A = 1, B = 0 transistor A conducts and Y becomes high, i.e. Y = 1. If A = 0 and B = 1; transistor B conducts Y = 1, if A = 1 and B = 1; both transistors conduct. If A = B = 0. None of the transistors conducts hence Y= 0. The true table is shown below.

The correct answer is: OR gate

From the figure,  
The correct answer is: 

The correct answer is:  

Y=P+PQ+P=P(1+Q)+P=P+P=1

The output matches with

Y=P+P+Q=1+Q=1

Hence, logic for Y=P+PQ+P.

Word length.
The correct answer is: word length