M.Sc. (Semester II) (CBCS) Examination, 2017
ELECTRONICS SCIENCE
FUNDAMENTALS OF ELECTRONICS
Day Date: Friday, 28-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
N.B. Q.1 and Q.2 are compulsory.
Attempt any three questions from Q. no. 3 to Q. no. 7.
Figures to the right indicate full marks.
Q.1 Select correct alternatives. 06
The unit of resistance is
amp. ohms volts watts
P-n junction diode conducts in
Reverse biasing Forward biasing
self biasing none of these
Current in the FET is
Two types One type
Reverse type Both a and b
When compare to other filters active filter gain is
Low High Moderate None of these
Op.Amp.is basically
coupled amplifier differential amplifier
direct coupled amplifier none of these
The most commonly used IC in the constructed of astable
multivibrator is
741 555 556 7400
State True or False 04
Passive elements dissipate power.
P-n Junction diode is used to conduct the current in only one
direction.
FET is having very high input impedance than BJT.
Gain decreased -20 db peer decade in first order active filter.
Fill in the blanks. 04
Out of passive device is than its input.
The basic material of LED is
The mathematical operations can be performed by the circuits
constructed using IC
The comparator compares the magnitude of input
signals.
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Q.2 Write short notes.
Passive and active elements and their uses. 05
Working of Solar cell. 05
Hybrid parameters of a transistor 04
Q.3 Explain the working of a voltage divider circuit and mention its
application.
08
Define Ohm's law. How it is used in a circuit. 06
Q.4 Explain the construction and working of solar cell and mentions its
applications.
08
Explain the use of Thevenin's theorem to simply a network. 06
Q.5 With a neat diagram explain the working of an op. amp. Integrator and
derive the equation of output parameter and draw the output
waveform under sine and square wave input.
08
Draw the input and output characteristics of a transistor in CE and list
its applications.
06
Q.6 Explain the working of instrumentation amplifier and mention its
applications.
08
Draw the circuit diagram of FET amplifier and explain its working. 06
Q.7 Draw the circuit diagram of an op. amp. comparator and justify its
working with input and output waveforms.
08
Design a DC power supply capable of outputting 15 volts/1A using
3-pin regulator IC.