Industrial Electronics - Dec 2014
Mechanical Engineering (Semester 4)
TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.
Solve any four:-
1 (a) Explain different types of diodes based on their operating quadrants of V-I characteristics.(5 marks)
1 (b) What is the concept of R-L & R-L-E load in case of phase controlled rectifiers?(5 marks)
1 (c) Design scaling adder using op-amp to give output as follows
V0=-(V1+V2+3V3) where given inputs V1, V2 & V3.(5 marks) 1 (d) State & prove De Morgan's theorem using truth table.(5 marks) 1 (e) What is linear actuator motor? Give two applications.(5 marks) 2 (a) Classify & explain triggering methods of SCR with circuit diagrams.(7 marks) 2 (b) Compare Power BJT, IGBT & MOSFET on the basis of their principle & characteristics.(7 marks) 2 (c) Explain TRIAC-DIAC circuit with the help of any one application.(6 marks) 3 (a) What is the necessity of inner current loop control circuit?(7 marks) 3 (b) Write a short note on speed control of a.c. motors.(7 marks) 3 (c) What is the principle of operation of bridge inverter? Classify them on the basis of applied input.(6 marks) 4 (a) What is an instrumentation amplifier? Explain it with block diagram & enlist its applications.(7 marks) 4 (b) What are the advantages of active filter over passive filter. Draw a circuit diagram and characteristics of active low pass filter using op-amp.(7 marks) 4 (c) Explain working of monostable mode of operation of IC555 timer.(6 marks) 5 (a) Draw and explain functional diagram of MSP430 microcontroller.(7 marks) 5 (b) What is a servomotor? What are the requirements of a good servomotor?(7 marks) 5 (c) What are functions of encoder & decoder circuits?(6 marks) 6 (a) Select motors for medium power pump & conveyor applications.(7 marks) 6 (b) Explain with an application significance of multiplexer and demultiplexer circuit.(7 marks) 6 (c) What are similarities & dissimilarities of microprocessor & microcontroller?(6 marks)