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10026
Reg. No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST/SECOND SEMESTER B.TECH DEGREE EXAMINATION, JULY 2016

Course Code: EC100
Course Name: BASICS OF ELECTRONICS ENGINEERING
Max. Marks: 100 Duration: 3 Hours

PART A
Answer ALL questions. Each question carries 2 marks

1. For the samples given below, specify the nominal value, tolerance, maximum and minimum
value.
a. A resistor coloured -yellow, violet, orange and gold
b. A capacitor with code- 104K
Differentiate active and passive components. Name at least two in each category.
Write any four applications of electronics in the field of automobile.

How a potential barrier is created in an open circuited PN junction diode?

ae ^ ‏تمصع‎

Why Silicon diode is more popular than Germanium? Mention its applications and cut-in

voltage.

6. Draw the symbol and write the general specifications of the following

a) Photo diode b) PNP transistor

7. Define peak inverse voltage and write the values for Half wave, Centre tapped and Bridge
rectifiers.

8. Draw the block diagram of a regulated power supply.

9. Compare positive and negative feedback.

10. What are the ideal characteristics of an op-amp?

11. What are the applications of CRO?

12. State and prove De-Morgan's theorem with truth table.

13. Modulation reduces the height of the antenna. Justify.

14. Define modulation index in AM and compute the percentage of modulation, when the
maximum amplitude is 10V and minimum is 6V.

15. What is uplink and downlink in satellite communication? Which frequency is kept higher and
why?

16. Write at least four important applications of RADARs.

17. What is hand-off in mobile communication and mention the types?

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