Industrial Electronics (EX-504 (A)) - Important Questions

Explain the operation of a voltage regulator (Zener diode voltage regulator) with a neat sketch.

Explain the operation of switched regulator (SMPS) and compare linear and switched power supply.

Draw the V-I characteristics of an SCR and mark the holding current and latching current.

Discuss operation of single-phase half-wave rectifier with RE load and derive average output voltage.

Explain principle of operation, transistor model, features and V-I characteristics of IGBT.

Write short note on applications of MOSFET, IGBT and SCR.

Explain the working principle of relaxation oscillator and window comparator using OP-AMP.

Describe how an OP-AMP can be used as a function generator.

Explain the functional block diagram of a PLC and its use with microprocessor.

Discuss the advantages and disadvantages of full-wave rectifiers in power supply applications.

Explain constructional features, principle of operation and terminology of silicon controlled rectifier (SCR).

Explain the ladder logic programming language used in PLCs with basic programming examples and how ladder diagrams represent control logic.

Explain the functions and applications of PLC and discuss advantages and disadvantages of PLC over conventional relay controllers.