For the logic circuit shown, the truth table is:

 

1.	A B Y 0 0 0 0 1 1 1 0 1 1 1 1
2.	A B Y 0 0 1 0 1 1 1 0 1 1 1 0
3.	A B Y 0 0 1 0 1 1 1 0 1 1 1 0
4.	A B Y 0 0 0 0 1 0 1 0 0 1 1 1

 

The increase in the width of the depletion region in a \(\mathrm{p\text{-}n}\) junction diode is due to:

The solids which have the negative temperature coefficient of resistance are:

Out of the following which one is a forward-biased diode?

1.
2.
3.
4.

Which of the following gate is called the universal gate? 
1. \(\mathrm{OR}\) gate 
2. \(\mathrm{AND}\) gate 
3. \(\mathrm{NAND}\) gate 
4. \(\mathrm{NOT}\) gate 

An intrinsic semiconductor is converted into an \(\mathrm{n\text{-}}\)type extrinsic semiconductor by doping it with: 

The circuit diagram shown here corresponds to the logic gate:

    
1. \(\mathrm{NOR}\)
2. \(\mathrm{AND}\)
3. \(\mathrm{OR}\)
4. \(\mathrm{NAND}\)

An LED is constructed from a \(\mathrm{p\text{-}n}\) junction diode using \(\mathrm{GaAsP}\). The energy gap is \(1.9~\text{eV}\). The wavelength of the light emitted will be equal to:
1. \(10.4 \times 10^{-26} \text{m}\)
2. \(654~ \text{nm}\)
3. \(654~ \text{m}\)
4. \(654\times 10^{-11}~\text{m}\)

To get output \(Y = 1\) in the given circuit which of the following input will be correct?

A Zener diode, having a breakdown voltage equal to 15 V, is used in a voltage regulator circuit as shown in the figure. The current through the diode is:

1. 5 mA
2. 10 mA
3. 15 mA
4. 20 mA