Exam Details
| Subject | Electronics | |
| Paper | ||
| Exam / Course | Diploma in Civil Engineering (DCLE) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Select the correct answer from the given four alternatives
In n-type semiconductor the minority carriers are
holes
electrons
holes and electrons
None of the above
In full wave rectifier, if the input frequency is 50 Hz, the output frequency is
50Hz
100Hz
200Hz
250Hz
Peak inverse voltage of full wave rectifier is
Vm
2Vm
sqrt(2)vm
V/sqrt(2)
The output of rectifier consists of
DC
AC
DC as well as some AC ripple
None of the above
The temperature coefficient of semiconductor is
positive
zero
negative
None of the above
In an amplifier, coupling capacitor is used to
match the impedance
prevent DC mixing with AC
control frequency
limit bandwidth
Silicon controlled rectifier is a/an
unidirectional device
bidirectional device
three-layer device
None of the above
(viii) In which region does the transistor act as a switch?
Cut-off
Active
Saturation
Both and
The transistor is in quiescent state, if
it is unbiased.
no current flows through it
emitter junction and collector junction are equally biased
no signal is applied to input
In a zener diode, if the load current decreases by the decrease in the load, the
zener current decreases
zener current increases
zener current remains constant
None of the above
Trigger circuit provides trigger pulse to
Frequency generator
Time base generator
Function generator
Square wave generator
CRT is also known as
Williams tube
Electron tube
Crookes tube
None of the above
(xiii) In combinational circuit output depends upon
clock pulse
previous input
previous output
None of the above
Which logic family is most immunised to noise?
CMOS
ECL
MOS
TTL
Give the energy band description of conductor, semiconductor and insulator;
What is the need of filter in rectifier circuit? Explain the capacitor filter circuit.
What is a transistor Explain the operation of a transistor as an amplifier.
Explain the input and output characteristic of a transistor in CC (Emitter Follower) configuration and give the current relation.
Explain the functional elements of generalised measuring system with a block diagram.
Explain the formation of a potential barrier in pn junction.
What is the function of actuator Classify the actuators with one example of each type.
Draw a schematic diagram of LVDT and explain its characteristics.
Explain the universal gates. Illustrate NOT, OR and AND gates using universal gates.
Describe the classification of instruments.
Discuss the working of a UJT as a relaxation oscillator.
Draw the symbol of an SCR. Discuss its characteristics.
8. Write short notes on any four of the following:
Microprocessor
Eddy Current Transducer
Lissajous Figures
Rectifiers
Field Effect Transistors
Semi-conducting Materials
Automatic Voltage Regulator
In n-type semiconductor the minority carriers are
holes
electrons
holes and electrons
None of the above
In full wave rectifier, if the input frequency is 50 Hz, the output frequency is
50Hz
100Hz
200Hz
250Hz
Peak inverse voltage of full wave rectifier is
Vm
2Vm
sqrt(2)vm
V/sqrt(2)
The output of rectifier consists of
DC
AC
DC as well as some AC ripple
None of the above
The temperature coefficient of semiconductor is
positive
zero
negative
None of the above
In an amplifier, coupling capacitor is used to
match the impedance
prevent DC mixing with AC
control frequency
limit bandwidth
Silicon controlled rectifier is a/an
unidirectional device
bidirectional device
three-layer device
None of the above
(viii) In which region does the transistor act as a switch?
Cut-off
Active
Saturation
Both and
The transistor is in quiescent state, if
it is unbiased.
no current flows through it
emitter junction and collector junction are equally biased
no signal is applied to input
In a zener diode, if the load current decreases by the decrease in the load, the
zener current decreases
zener current increases
zener current remains constant
None of the above
Trigger circuit provides trigger pulse to
Frequency generator
Time base generator
Function generator
Square wave generator
CRT is also known as
Williams tube
Electron tube
Crookes tube
None of the above
(xiii) In combinational circuit output depends upon
clock pulse
previous input
previous output
None of the above
Which logic family is most immunised to noise?
CMOS
ECL
MOS
TTL
Give the energy band description of conductor, semiconductor and insulator;
What is the need of filter in rectifier circuit? Explain the capacitor filter circuit.
What is a transistor Explain the operation of a transistor as an amplifier.
Explain the input and output characteristic of a transistor in CC (Emitter Follower) configuration and give the current relation.
Explain the functional elements of generalised measuring system with a block diagram.
Explain the formation of a potential barrier in pn junction.
What is the function of actuator Classify the actuators with one example of each type.
Draw a schematic diagram of LVDT and explain its characteristics.
Explain the universal gates. Illustrate NOT, OR and AND gates using universal gates.
Describe the classification of instruments.
Discuss the working of a UJT as a relaxation oscillator.
Draw the symbol of an SCR. Discuss its characteristics.
8. Write short notes on any four of the following:
Microprocessor
Eddy Current Transducer
Lissajous Figures
Rectifiers
Field Effect Transistors
Semi-conducting Materials
Automatic Voltage Regulator
Other Question Papers
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Subjects
- Advanced Survey
- Applied Mechanics
- Chemistry
- Computer Basics
- Concrete Technology
- Construction Drawing
- Construction Technology- I
- Construction Technology- II
- E/M Engineering
- Electrical Technology
- Electronics
- Elementary Civil Engineering
- Elements of Survey
- Engineering Drawing
- Engineering Materials
- Environmental Engineering
- Estimating & Quantity Surveying- I
- Estimating & Quantity Surveying- II
- Fluid Mechanics
- Heat Power Technology
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- Mathematics-I
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- Strength of Materials
- Theory of Structures- I
- Theory of Structures- II
- Workshop Technology