Logic Gates

Q.

The full form of alu is?

Q. Figure gives a system of logic gates. From the study of truth table it can be found that to produce a high output (1) at R, we must have

1. X = 0, Y = 1
2. X = 1, Y = 1
3. X = 1, Y = 0
4. X = 0, Y = 0

Q.

400 joules of heat is produced per second in a $4\Omega$ resistor. What is the potential difference across the resistor?

Q.

What are the properties of logic gates?

Q.

An AND gate can be prepared by repetitive use of:

1. NOT gate

2. OR gate

3. NAND gate

4. NOR gate

Q.

The logic circuit below has the input waveforms A and B as shown. Pick out the correct output waveform.

1. 

2. 

3. 

4. 

Q.

What are universal gates why are they called so?

Q. In the circuit as shown in figure, A and B represent two inputs and C represents the

1. NOR gate
2. OR gate
3. NAND gate
4. AND gate

Q.

1. 0000000000

2. 0101101000

3. 1111111111

4. 1010010111

Q.

An electric kettle is marked with $500W;250V.$ What is the resistance of its heating filament?

Q.

1. OR gate

2. AND gate

3. NOT gate

4. None of above

Q.

1. 1, 4, 3

2. 4, 2, 1

3. 4, 1, 2

4. 1, 3, 4

Q.

1. 0, 1

2. 0, 0

3. 1, 0

4. 1, 1

Q.

The combination of gates shown below yields

1. NAND gate

2. OR gate

3. XOR gate

4. NOT gate

Q. half adder is an example of-

1. Sequential circuit
2. Asynchronous circuit
3. Combinational circuit
4. None of these