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SPPU First Year Engineering (Semester 2)
Basic Electrical Engineering (BEE)
May 2017
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question from Q.1(a,b) &Q.2(a,b)
1(a) Draw the construction diagram and explain working of LED.
6 M
1(b) Explain with a neat circuit diagram, function of each compoent in single stage CE amplifier.
6 M

2(a) In a center tapped FWR, the rms half secondary voltage is 10V. Assuming ideal diodes and load ressistance of 2kΩ, find: DC load current, ripple factor and efficiency of rectification.
6 M
2(b) Draw and explain drain and transfer characteristics of enhancement type P-channel MOSFET.
6 M

Solve any one question from Q.3(a,b) & Q.4(a,b)
3(a) Define Op-Amp. Draw and explain the functional block diagram of an Op-Amp.
6 M
3(b) Write law of commutation, law of association and law of distribution for AND and OR logic function.
6 M

4(a) Calculate output voltage 'Vo ' Op-Amp circuit shown in figure Draw I/P and O/P waveforms.
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6 M
4(b) Draw and explain the block diagram of microprocessor.
6 M

Solve any one question from Q.5(a,b) & Q.6(a,b)
5(a) Draw construction of DIAC and explain working with V-I characteristics.
6 M
5(b) What is electronic weighing machine? With the help of neat block diagram explain its working.
7 M

6(a) Define tranducer. What are the selection criteria for a good transducer?
7 M
6(b) Draw and explain the block diagram of basic instrumentation system.
6 M

Solve any one question from Q.7(a,b) &Q.8(a,b)
7(a) What is electronic communication system? Explain the elements of communication system with the help of neat block diagram.
7 M
7(b) Explain different types of cables used in communication system with a neat diagrams.
6 M

8(a) Draw neat block diagram of GSM system and explain its working.
6 M
8(b) Define modulation index with reference to AM and FM. Write equations of modulation index. Draw AM waveform for 100% modulation case.
7 M

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