# Digital Electronics - Logic Gates - Discussion

### Discussion :: Logic Gates - General Questions (Q.No.6)

6.

The output of an OR gate with three inputs, A, B, and C, is LOW when ________.

 [A]. A = 0, B = 0, C = 0 [B]. A = 0, B = 0, C = 1 [C]. A = 0, B = 1, C = 1 [D]. all of the above

Explanation:

No answer description available for this question.

 Bhavani said: (Dec 31, 2010) Because OR gate only low value in one only

 Akshay Topre said: (Jan 3, 2011) Bcoz OR gate performs addition between two variables. If we want low output, then all variables values should be low, if any one of d value becomes high, then the output of OR gate will be high.

 Anshuman said: (Jul 29, 2011) Output of OR gate is sum of inputs so. When the inputs are 0, 0 and 0 than output is also ZERO.

 Varun Pathania said: (Oct 2, 2011) Its answer is option a not d because in or gate if any input is one than output is also one.

 Manish Kumar said: (Oct 5, 2011) Bcoz in OR GATE addition is performed between two variables. A/q to queston output is low. In OR GATE output is low in one condition when all inputs are low. Y=A+B+C when the inputs are 0 then output will be 0.

 Manish Kumar said: (Oct 5, 2011) Because in OR GATE addition is performed between two variables. A/q to queston output is low. In OR GATE output is low in one condition when all inputs are low. Y=A+B+C when the inputs are 0 then output will be 0.

 Sathish said: (Jan 20, 2012) Here give low value only for OR gate so, output is low, As per OR Gate Truth table.

 Mohammad said: (Dec 14, 2014) A B C OUTPUT(A+B+C) TRUTH TABLE. -- -- -- ------------ 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1

 Siva said: (Jul 24, 2018) A B C OUTPUT(A+B+C) TRUTH TABLE. -- -- -- ------------ 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1

 Siva said: (Jul 24, 2018) Because OR gate only low value in one only.

 Dimpu said: (Mar 1, 2019) OR gate means +operation. So, the output is low. When all inputs are low (0).