Electronics - Logic Gates - Discussion


The output will be a LOW for any case when one or more inputs are zero in a(n):

[A]. OR gate
[B]. NOT gate
[C]. AND gate
[D]. NAND gate

Answer: Option C


No answer description available for this question.

Mohammad Bandheli said: (Oct 31, 2010)  
I did not understood question properly it is not clear that much please to write clearly questions.

Seshendra Chinde said: (Nov 6, 2010)  
For AND gate the truth table is ...
If one of the inputs is zero(LOW),then the output is zero(LOW). We get output as one(HIGH) only whenever the inputs are one(HIGH).....

Pawan said: (Dec 28, 2010)  
For AND gate when any one of the input is LOW(
ZERO) the output is LOW.

Vikranth N said: (Jan 3, 2011)  
In simple to make it clear ... The output of the AND gate will be high only if both the inputs are 1...Consider if A and B are two inputs... th output will be high only if A AND B are 1)....That is why it is caale as an AND gete!!!

Shaik said: (Mar 29, 2011)  
AND gate performs multiplication. Hence multiplication of one or more low inputs (0) gives output low.

Ashish Singhal said: (Oct 18, 2011)  
When both inputs are high then output is high otherwise not.

AND gate means multiply.

Truth Table:

A B Output
0 0 0
0 1 0
1 0 0
1 1 1

Dikky said: (Oct 28, 2011)  
AND gate is A*B then any in put is low then out put is low.

Gitendra Kumar said: (Nov 22, 2011)  
Yes right AND gates means mutiply than mostely output is zero.

Pavani said: (Dec 1, 2011)  
If one input is LOW then the output of AND gate is LOW.

Uma said: (May 5, 2012)  
AND gate is A*B then any input is low then output is low.

Sumathi said: (May 16, 2012)  
AND gate truth table


Ankush Tarika said: (Jun 10, 2012)  
AND Gate : in case of AND if both the inputs are high then output is high means "1",otherwise it is low "zero".

Rajeev said: (Nov 3, 2012)  
AND gate always works as a input multiplier & it is clear that any value multiply with 0 always gives 0 as result.

Vidhyasagar said: (Jul 5, 2013)  
0*0 = 0
0*1 = 0
1*0 = 0
1*1 = 1

Clearly show that the low output at low input.

Kratika Dhoot said: (Jul 18, 2013)  
OR gate inputs have A and B and its output is Q.

A B Q(A+B)
0 0 0
0 1 1
1 0 1
1 1 1

Here, for OR gate, output is not low when the inputs are zero.

NOT gate reflects an opposite result.
That is:- when input is 0, output is 1.
When input is 1, output is 0.
Thus, it does not reflects that output is low.

NAND gate inputs are A and B and its output is Q.

A B Q( oomplement of A*B)
0 0 1
0 1 1
1 0 1
1 1 1

Here we have seen that, when any of the input is 0, output is high, ie. 1.
AND gate:- Inputs are A and B and Output is Q.

A B Q(A*B)
0 0 0
0 1 0
1 0 0
1 1 1

For AND gate, we have seen that, whenever there is 0 as an input, we are getting the l ow value that is:- zero(0).

Hence answer is AND gate.

A.Mohamed Imrankhan said: (Feb 23, 2014)  
We know that the AND gate will working on the principle of multiplication. The truth table of AND gate is shown below,

0 0 0
0 1 0
1 0 0
1 1 1

In truth table A & B are input and Y is output. Consider the truth table in multiplication principle. If any one of the input is zero,the AND gate produces the output low(zero). If two inputs is one(1 1)then the AND gate produces the output high(1).

Nikhil said: (Oct 27, 2014)  
Simply keep in mind, AND is always multiplication.

Izhar Khan said: (Dec 17, 2014)  
If any inputs is low then output must be low, both input is high then output must be high. (because the function of AND GATE is multiplication).

G.Mahendra said: (Jun 6, 2015)  
Let us consider two inputs of a gate A & B.

If A=0 & B=0 the o/p of AND gate OR gate are [0].

But A=1 & B=0 the o/p of AND gate is [0] and A=0 & B=1 here also And gate o/p is 0.

Ans:- Option C.

Ashok said: (Jul 18, 2015)  
Which gates are universal gate?

Kz Mimy said: (May 31, 2016)  
Hi guys, Are AND gate true?

For me, I think it is true since when you do truth value than two or one input when they are zero the output is low.

Kaiyum said: (Dec 17, 2018)  
Explain about the logic gate.

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