How many minimum number of NOR gates are required to obtain an AND gate?
1. One
2. Two
3. Three
4. Five

The circuit shown below is an electrical analogue for which of the following logic gates?
        
1. AND gate
2. OR gate
3. NOT gate
4. NOR gate

What is the equivalent resistance across the terminals of the battery if the diodes are ideal?

In an amplifier, an npn-transistor is used in common-emitter mode. If $\beta$ =25, then what will be the collector current if emitter current is 13 mA?

1. 13.5 mA

2. 12.5 mA

3. 11 mA

4. 10.5 mA

What is the name of the logic gate represented by the following symbol?
              

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

The combination of gates shown in the diagram is equivalent to:
              

1. OR
2. AND
3. NAND
4. NOT

For the logic circuit given below, the output \(Y\) for \(A=0,B=0\) and \(A=1,B=1\) are:

          
1. \(0\) and \(1\)
2. \(0\) and \(0\)
3. \(1\) and \(0\)
4. \(1\) and \(1\)

A Zener diode is used to obtain a constant voltage. If applied voltage \(\text V\) changes, then:
(\(\text V\) is more than Zener voltage)
             

A transistor circuit in a common emitter configuration is shown. The current gain is 100. If \(V_{BE}\approx 0,\) then \(V_{CE}\) is given by:

1. 6 V

2. 5 V

3. 4 V

4. 3 V