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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE SPECIAL EXAMINATION, SEPTEMBER 2016

Course Code: 198101-04
Course Name: INTRODUCTION TO ELECTRONICS ENGINEERING
Max. Marks: 100 Duration: 3 Hours
PART A

Answer ALL questions. Each question carries 2 marks

Why is it necessary to connect an electrolytic capacitor in a circuit with correct polarity?

Write the color code for 10022 Resistor with tolerance 2596,

What are the specifications of transformer?

Why does an intrinsic semiconductor behave like an insulator at absolute zero temperature?
Explain why LEDs emit different colours.

Identify the diodes (۸۸111 5

“For better operation of transistor amplifiers operating point is fixed at the middle of active
region”. Justify it.

For CB input characteristic IE vs. VEB curves move inwards for higher valucs of Vn. Justify.
Suppose you have a single stage amplifier, Assume you removed the bypass capacitor at the
emitter terminal, How does it affect the frequency response
characteristics?

What is meant by the threshold voltage of a MOSFET?

What is intrinsic standoff ratio of UJT?

How UIT can be used to trigger an SCR?

What is SMPS and where it is used?

For the given clipper circuit input is 1077 peak to peak sine
wave. Plot the output waveform. VB =3V (Fig 1)

For the given circuit, find out Va(Assume the diode to be a
practical one) (Fig 2)

Calculate the ripple factor of a capacitor filter for a peak rectified
voltage of 30V, capacitor C=100pF, and load current of 50൩൧.

Digital multimeters are superior to analog multimeters. Give reason. Fig 2