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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 15

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Why are the NAND and NOR logic gates called digital building blocks?

Important Questions on Logic Gates

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 16

Draw a logic circuit diagram showing how a NAND gate can be converted into a NOT gate?

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 17

The output of a two-inputs AND gate is fed to a NOT gate. Draw the logic circuit of the combination of gates. Give its logic symbol and write its truth table.

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 18

Arrangement given below represents a logic gate. Complete it showing outputs at $C$ and $D$ .

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$A$	$B$	$C$	$D$
$0$	$0$
$1$	$0$
$0$	$1$
$1$	$1$

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 19

Identify the logic gate whose truth table is drawn its logical symbol.

$A$	$B$	$Y$
$0$	$0$	$1$
$0$	$1$	$1$
$1$	$0$	$1$
$1$	$1$	$0$

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 19

If the output of a NAND gate is fed as input of a NOT gate, name the logic gate formed.

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 20

Using several 'NAND' gates, how can you obtain an 'AND' gate? Draw a labelled diagram in support of your answer.

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 21

The output of a two-inputs OR gate is fed to a NOT gate. Name the new gate obtained. Draw the logic circuit of the combination of gates. Give its logic symbol and write down its truth table.

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ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 22

The output of an OR gate is connected to both the inputs of a NAND gate. Draw the logic circuit of this combination and write its truth table.