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Q. Identify the true statement for $OR$ gate

J & K CETJ & K CET 2008Semiconductor Electronics: Materials Devices and Simple Circuits

A

Output Y will be 1 when input A or B or both are 1

57%

B

Output Y will be 0 when the either of the inputs A or B is 1

10%

C

Output Y will be 1 only when both the inputs A and Bare 1

27%

D

Output Y will be 1 only when either of the inputs A and B are 1

7%

Solution:

In an $OR$ gate, output $V$ is $1$ only when either or both the inputs $A$ and $B$ are $1$. The truth table is shown below.

$A$ $B$ $Y$

$0$ $0$ $0$

$0$ $1$ $1$

$1$ $0$ $1$

$1$ $1$ $1$