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

Which one of the following represents an analog circuit diagram for OR gate?

1.		2.
3.		4.

Which of the following-junction is used unbiased?

1. Photo diode

2. LED

3. Zener diode

4. Solar cell

1. \(36~\text{mW}\)
2. \(12~\text{mW}\)
3. \(144~\text{mW}\)
4. \(72~\text{mW}\)

An $n-p-n$ transistor having A.C. current gain of 50 is to be used to make an amplifier of voltage gain 6. What will be the power gain in the amplifier?

1. 300

2. 600

3. 750

4. 400