21.
22.

23.
24.

25.

26.
27.

28.

29.

30.

31.

32.

33.

34.

35.

36.

PART B

Answer any 8 complete questions each having 5 marks

Discuss the construction, working and application of electrolytic capacitor.

What is the basic working principle of transformer? List at least four different types of
transformers and its applications.

Draw the VI characteristics of Zener diode and explain the principle of working.

Draw a sketch to show all the current components of an NPN transistor and derive the relation
between currents.

Compare CB, CE and CC configurations of a transistor. Enumerate the applications of each
configuration.

What is a full wave rectifier? Derive the expression for rectifier efficiency and ripple factor.

Draw the circuit diagram of a single stage RC coupled amplifier and explain the significance of

each component.
Draw the circuit and explain the working of an inverting amplifier with op-amp and derive the
expression for its closed loop gain.

Differentiate between analog and digital integrated circuits. Write at least four application

specific integrated circuits from each group.

Draw the block diagram of a digital storage oscilloscope and specify the functions of each block.

Answer any 4 complete questions each having 5 marks

Define amplitude modulation. Draw the AM signal and its spectrum. Derive an expression for
modulation index and total power in an AM signal.

What are the different types of RADARs and explain any one type with a block diagram.

What is satellite transponder? Explain its working with a block diagram.

Describe with the help of diagrams, how a call is established between two mobile phone
subscribers.

Sketch the elements associated with an optical fiber communication system and describe the
different types of optical fiber cables available for establishing the link.

Sketch the elements associated with a cable TV system and explain the functions of each.

www.ktustudents.in