Semiconductor E...

The following is NOT equal to $$0$$ in the Boolean algebra is

Consider the following statements A and B and identify the correct answer.
Statement(A):A Zener diode is always connected in reverse bias to use it as voltage.
Statement(B):The potential barrier of a p-n junction lies between $$0.1$$ to $$0.3\ V$$, approximately.

There is a sudden increase in current in zener diode is

A Zener diode when used as a voltage regulator, is connected 
(a) in forward bias. 
(b) in reverse bias.
(c) in parallel to the load.
(d) in series to the load.

The gate that can act as a building block for the digital circuits is 

In the Boolean algebra: $$\overline{A+B}$$ is equal to:

The minimum number of gates required to realise the expression $$Z = DABC + D\overline{ABC}$$ is

Boolean expression $$Y = A.\bar{B} + B.\bar{A}$$ is given. If $$A = 1, B = 1$$ then $$Y =$$

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than $$2480\ nm$$ is incident on it. The forbidden band energy for the semiconductor in $$eV$$ is 

To get an output Y=1 from the circuit above, the input must be