Semiconductor Electronics: Materials, Devices and

Zener breakdown occurs in a P- n junction having P and n both:

A 5 V battery is connected across the points X and Y. Assume D₁ and D₂ to the normal silicon diodes. Find the current supplies by the battery if the +ve terminal of the battery is connected to point X.

For extrinsic semiconductors; when doping level is increased

The truth table for the following, logic circuit is

The output $\left(Y\right)$  of the given logic gate is similar to the output of an/a

In an ideal transformer, the turns ratio is $\frac{N_P}{N_S}=\frac{1}{2}$ . The ratio $V_S:V_P$  is equal to (the symbols carry their usual meaning) :

In the circuit shown below, maximum zener diode current will be _________mA.

In a given circuit diagram, a 5 V zener diode along with a series resistance is connected across a 50 V power supply. The minimum value of the resistance required, if the maximum zener current is 90 mA be________ $\Omega$ .

Consider a situation in which reverse biased current of a particular P – N junction increase when it is exposed to a light of wavelength $\le$  621 nm. During this process, enhancement in carrier concentration takes place due to generation of hole – electron pairs. The value of band gap is nearly.