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12th Physics Monthly Test - 2 ( Semiconductor Electronics )

St. Britto Hr. Sec. School - Madurai

12th Physics Monthly Test - 2 ( Semiconductor Electronics )-Aug 2020

Time : 2.00 Hours

Part - A

Generic 2 - Answer All Question

What do you mean by leakage current in a diode?

Define depletion region.

What is meant by efficiency (\(\eta\))?

Define amplification.

What is conduction band?

A diode is called as a unidirectional device. Explain.

What is meant by Biasing?

Give circuit symbol, logical operation, truth table, and Boolean expression of AND, OR, NOT, NAND, NOR, and EX-OR gates
How electron-hole pairs are created in a semiconductor material?

Explain the current flow in a NPN transistor

Define bias voltage.

What is forward V-1 characteristics?

Define Reverse bias.

Distinguish between intrinsic and extrinsic semiconductors.

Mention any three application Zener diode.

Distinguish between avalanche and zener breakdown.

Mention any three LED application.

What is called logical operators?

Define photovoltaic effect.

Discuss the biasing polarities in an NPN and PNP transistors.

Draw the output waveform of a full wave rectifier.

Define Zener effect.

Mention the application of a oscillators.

What is barrier potential?

Define Rectification.
What do you mean by doping?

What is called output resistance?

Part - B

Generic 5 - Answer All Question

Explain the formation of PN junction diode. Discuss its V-1 characteristics.

Explain the working principle of a solar cell. Mention its applications.

Write any two distinguishing features between Insulators, Metals and semiconductors and insulators an the basis of energy band diagrams.

Draw the circuit diagram of a half wave rectifier and explain its working
Explain and classify transistor as an oscillator.

State Boolean laws. Elucidate how they are used to simplify Boolean expressions with suitable example.

Sketch the static characteristics of a common emitter transistor and bring out the essence of input and output characteristics.

For a BJT circuit shown, assume that the \('\beta'\) of the transistor is very large and V_BE= 0.7 V. The mode of operation.

State and prove De Morgan's First and Second theorems.

What is an LED? Give the principle of operation with a diagram.

Elucidate the formation of a N-type and P-type semiconductors.

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