Electronics CHSE 2nd year Science syllabus



+2 2nd Year THEORY

Unit -1 Periods -10

(a) Amplifiers:- -RC coupled transistor amplifiers, voltage gain, frequency

Response Curve, Band Width, Gain Band Width product, Advantages and use : power

Amplifiers-, working principle,

(b) Feedback amplifiers:- Feedback technique, gain, negative feedback, voltage feedback

amplifiers, current feed back amplifiers, effect of negative feed back on input and output

impedance, voltage gain,

(c) Oscillators:- Condition for sustained oscillation, Bark-haussen criterion, tank circuit

with positive feedback,, Hartley oscillator, colpitt oscillator, , Crystal oscillator and its

frequency stability. (Qualitative analysis of all these oscillator).

Unit-II Periods -10

(a) Modulation and transmitters:- Type of modulation, amplitude modulation, side

band, power dissipation in side band, modulation index and its significance, AM

transmitter(explanation in block diagram),

Frequency modulation : super heterodyne receiver (explanation in block diagram),FM

demodulation FM detection, block diagram of FM receiver and explanation of each stage,

Unit-III Periods -8

(a) Digital Electronics:- Decimal and binary numbers, conversion, binary arithmetic,

Boolean algebra, De Morgan’s theorems.

Logic gates – OR,AND, NOT,NAND,NOR,XOR, circuit symbol, use, truth table only

(No electronics circuit for NAND, NOR & XOR)

(b)Antenna :- Principle and basic idea, types of antenna, dipole antenna,

Marconi Yagi antenna, use in transmission,

Unit-IV Periods -8

(a) Propagation of Radio Waves:- Modes of propagation of radio waves: ground waves,

sky waves, space waves, skip distance, maximum usable frequency, general idea

about satellite communication,

(b) TV :- Principle of TV transmission, , TV transmitter

and receiver (explanation in block diagram).

Unit-V Periods -8

(a) Power Electronics :- Idea about JFET,SCR, , UJT, their working,

characteristics and uses.

(b) RADAR and CRO:- Basic principle of Radar, Block diagram of Radar, its function and


Cathode Ray Oscilloscope, Basic idea and use with working.