The truth table for the circuit given in the fig. is:
           

 

1.	\(A\)	\(B\)	\(Y\)	2.	\(A\)	\(B\)	\(Y\)
	0	0	1		0	0	1
	0	1	1		0	1	1
	1	0	1		1	0	0
	1	1	1		1	1	0
3.	\(A\)	\(B\)	\(Y\)	4.	\(A\)	\(B\)	\(Y\)
	0	0	0		0	0	1
	0	1	0		0	1	0
	1	0	1		1	0	0
	1	1	1		1	1	0

The logic gate equivalent to the given logic circuit is:

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

In the digital logic circuit shown, what is the sequence of output values at terminal \(Z\) corresponding to the input combinations \((A,B)=(1,0),(0,0),(1,1)\) and \((0,1)\text{?}\)

A diode with a forward bias voltage drop of \(0.5~\text{V}\) has a maximum safe current rating of \(10~\text{mA}.\) Suppose this diode is connected in series with a resistor to a battery of EMF \(1.5~\text{V}.\)What minimum resistance value is required to ensure the current does not exceed the diode's safe operating limit?
1. \(300~\Omega \)
2. \(50~\Omega \)
3. \(100~\Omega \)
4. \(200~\Omega\)

If a semiconductor photodiode can detect a photon with a maximum wavelength of \(400~\text{nm},\) then the energy of its band gap is:
(take Planck’s constant \(h=6.63 \times 10^{-34} \text { J-s }\) and speed of light \(c=3 \times 10^8\) m/s)
1. \(3.1~\text{eV}\)
2. \(1.1~\text{eV}\)
3. \(2.0~\text{eV}\)
4. \(1.5~\text{eV}\)

With increasing biasing voltage of a photodiode, the photocurrent magnitude:

Two Zener diodes (\(A\) and \(B\)) having breakdown voltages of \(6~\text{V}\) and \(4~\text{V}\) respectively, are connected as shown in the circuit below. The output voltage \(V_0\) variation with input voltage linearly increasing with time, is given by: (\(V_{\text{input}}=0~\text{volt}\) at \(t=0~\text{second}\) and figures are qualitative)

1.
2.
3.
4.

Take the breakdown voltage of the Zener diode used in the given circuit as \(6~\text{V}\). For the input voltage shown in figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to scale)

1.		2.
3.		4.

For extrinsic semiconductors, when doping level is increased:

The truth table for the following logic circuit is :