12th Physics | Chapter 10 | Important 2 Mark Questions | Electronics and Communication

Important two-mark questions from the chapter “Semiconductor Devices and their Applications” are provided for thorough exam preparation. Topics such as diodes, transistors, logic gates, and their uses are explained. These answers are crafted to help students understand concepts clearly and perform well in exams!

1.What do you mean by doping?

The process of adding impurities to the intrinsic semiconductor is called doping.

It increases the concentration of charge carriers (electrons and holes) in the semiconductor and in turn, its electrical conductivity. The impurity atoms are called dopants and its order is approximately 100 ppm (parts per million).

2.Draw the input and output waveform of a half wave rectifier?

Circuit Diagram

3.Draw the circuit diagram of a full wave rectifier?

4.What is skip area?

The zone (in between A and B) where there is no reception of electromagnetic waves neither ground nor sky is known as skip zone or skip area

5.Define skip distance?

The shortest distance between the transmitter and the point of reception of the sky wave along the surface is called as the skip distance.

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