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FIRST SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2016
Course Code: EC100
Course Name: BASICS OF ELECTRONICS ENGINEERING

Max. Marks: 100 Duration: 3 Hours

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PARTA
Answer ALL questions. Each question carries 2 marks

Differentiate relays and contactors and write the applications of each.

What is tolerance of a resistor? Find the resistance range for the carbon resistor having the colour
bands: yellow, violet, red and gold.

Write any four applications of electronics in the field of defence.

Draw the energy band diagrams of insulator, semiconductor and conductor.

How does an Avalanche breakdown differ from Zener break down?

Write the type number of the following: a) Low frequency low power transistor, b) High
frequency low power transistor, 0) Power Transistor, 6) Rectifier Diode.

What is the working principle of SMPS?

Describe the 1016 of different capacitors in RC coupled amplifier?

Define bandwidth of an amplifier and mark the important parameters in the frequency response
graph.

Draw the internal block diagram of op-amp and write the functions of each block?

Realize the logic functions: Sum S= A+B and Carry Cy =AB using gates and prepare the truth
table.

What are the advantages of integrated circuits?

What is frequency modulation? Write the frequency bands used for AM and FM broadcast.

Write the RADAR range equation and list the factors affecting the range.

Distinguish between LEO, MEO and GEO satellites.

Discuss the basic principle of GPS.

Compare the features of GSM and CDMA.

Explain the total internal reflection in optical fiber with the help of a diagram.

What is the need for cell splitting in cellular communication system?

What are the characteristics of Plasma Display?

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