EASY
12th ICSE
IMPORTANT
Earn 100

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

Important Questions on Logic Gates

EASY
12th ICSE
IMPORTANT
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.
EASY
12th ICSE
IMPORTANT
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.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 23

Write the truth table of the following circuit. Name the gate represented by this circuit.

Question Image

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 24

Write the truth table for the following combination of gates.

Question Image

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 25

Identify which basic logic gates are represented by the circuits in dotted-line rectangles 1, 2 and 3 in the following complicated digital circuit. Give the truth table for the entire circuit.

Question Image

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 1
Give the logic symbol, truth table and Boolean expression for the OR gate. How can this gate be realised in practice?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 2
Give the logic symbol, truth table and Boolean expression for the AND gate. How can one realise this gate in actual practice by using junction diodes?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 21 - Logic Gates>QUESTIONS>Q 3
Give the logic symbol, truth table and Boolean expression for the NOT gate. Explain, with a circuit diagram, how this gate is realised in practice.