Electronics Circuit: Circuit elements, Voltage and Current Sources, Nodal analysis, Mesh analysis, Superposition theorem, Thevenin's theorem, Norton's theorem. Semiconductor Theory: Classification of electrical materials, Semiconductors, Intrinsic and extrinsic semiconductors. Diodes and Applications: p.n. Junction, Rectifier diodes, rectification circuits and signal shaping circuit (clipping and clamping), Zener diode, Light emitting diode; Photoconductive diode, Photoreceptive diode. Transistors: B.J.T construction and operation, Characteristic, Transistor biasing (CE, CB, CC), Load line, Q-point. Transistor a.c. equivalent circuits. Small signal amplifies: Current, Voltage and Power gain input and output impedance.