When all the inputs of a NAND gate are connected together, the resulting circuit is:

Question

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Answer 1

The equation of NAND gate is
$Y = \overset{ˉ}{A} . \overset{ˉ}{B}$

When both the terminals are connected together.

$A = B = A$

$Y = \overset{ˉ}{A} . \overset{ˉ}{A} = \overset{ˉ}{A} . \overset{ˉ}{A} = \overset{ˉ}{A}$

Which is nothing but the equation of NOT gate.

$Y = \overset{ˉ}{A}$

Option $A$ is the correct answer

Answer 2

The equation of NAND gate is

Y = \overset{ˉ}{A} . \overset{ˉ}{B}

When both the terminals are connected together.

A = B = A

Y = \overset{ˉ}{A} . \overset{ˉ}{A} = \overset{ˉ}{A} . \overset{ˉ}{A} = \overset{ˉ}{A}

Which is nothing but the equation of NOT gate.

Y = \overset{ˉ}{A}

Option

A

is the correct answer