Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 2nd Semester (Second Semester) 2017-2018 131241 Basic Electronics Question Paper
Paper Id: 131241 Roll No.
B.TECH
(SEM 2) THEORY EXAMINATION 2017-18
BASIC ELECTRONICS
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
A.?Derive the relationship between ? & ?.
B. The reverse saturation current of a Si p-n junction diode is 10 ?A at 300K.Determine the
forward bias voltage to be applied to obtain diode current of 100mA.
C. A Lissajous pattern on an oscilloscope is stationary and has 4 horizontal and 3 vertical
tangencies. The horizontal frequency is 50 Hz, find vertical frequency.
D. Explain the principle of operation of LED.
E. Describe how FET can be used as voltage variable resistor?
F. Sketch the circuit of op-amp as an integrator and differentiator.
G. The unmodulated r.m.s current of an AM wave is 8.93A and it increase to 11.25A with
modulation. Determine the modulation index.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
A. Explain the operation of full wave bridge rectifier with the help of a circuit diagram. Also
sketch the input and output waveforms. Define its PIV. Also derive its ripple factor and
rectification efficiency.
B. Define clipper circuit. Sketch the output waveform for the circuit shown below for given input
(Fig 1).
Fig. 1
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Printed Pages: 04 Sub Code: REC201
Paper Id: 131241 Roll No.
B.TECH
(SEM 2) THEORY EXAMINATION 2017-18
BASIC ELECTRONICS
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
A.?Derive the relationship between ? & ?.
B. The reverse saturation current of a Si p-n junction diode is 10 ?A at 300K.Determine the
forward bias voltage to be applied to obtain diode current of 100mA.
C. A Lissajous pattern on an oscilloscope is stationary and has 4 horizontal and 3 vertical
tangencies. The horizontal frequency is 50 Hz, find vertical frequency.
D. Explain the principle of operation of LED.
E. Describe how FET can be used as voltage variable resistor?
F. Sketch the circuit of op-amp as an integrator and differentiator.
G. The unmodulated r.m.s current of an AM wave is 8.93A and it increase to 11.25A with
modulation. Determine the modulation index.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
A. Explain the operation of full wave bridge rectifier with the help of a circuit diagram. Also
sketch the input and output waveforms. Define its PIV. Also derive its ripple factor and
rectification efficiency.
B. Define clipper circuit. Sketch the output waveform for the circuit shown below for given input
(Fig 1).
Fig. 1
C. Draw the basic structure of CB BJT and explain its principle of operation with in neat
diagram along with its input and output characteristics.
D. Explain CRO with the help of diagram. How can we measure phase and frequency using
CRO?
E. Define op-amp with the help of block diagram. Also draw its equivalent circuit. List the ideal
characteristics of op-amp.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
A (i) Find the range of RL and IL that will maintain a constant output voltage of 10V (Fig. 2)
(ii) Also determine the maximum wattage rating of the Zener diode for given circuit.
Fig. 2
B. Discuss the construction and working of tunnel diode. Also sketch its I-V characteristics and
explain.
4. Attempt any one part of the following: 7 x 1 = 7
A. For the voltage divider network shown below (Fig. 3), Given IDSS=10mA,Vp=-3.5 V,
determine VG, IDQ, VGSQ, VD,VS & VDSQ
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Printed Pages: 04 Sub Code: REC201
Paper Id: 131241 Roll No.
B.TECH
(SEM 2) THEORY EXAMINATION 2017-18
BASIC ELECTRONICS
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
A.?Derive the relationship between ? & ?.
B. The reverse saturation current of a Si p-n junction diode is 10 ?A at 300K.Determine the
forward bias voltage to be applied to obtain diode current of 100mA.
C. A Lissajous pattern on an oscilloscope is stationary and has 4 horizontal and 3 vertical
tangencies. The horizontal frequency is 50 Hz, find vertical frequency.
D. Explain the principle of operation of LED.
E. Describe how FET can be used as voltage variable resistor?
F. Sketch the circuit of op-amp as an integrator and differentiator.
G. The unmodulated r.m.s current of an AM wave is 8.93A and it increase to 11.25A with
modulation. Determine the modulation index.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
A. Explain the operation of full wave bridge rectifier with the help of a circuit diagram. Also
sketch the input and output waveforms. Define its PIV. Also derive its ripple factor and
rectification efficiency.
B. Define clipper circuit. Sketch the output waveform for the circuit shown below for given input
(Fig 1).
Fig. 1
C. Draw the basic structure of CB BJT and explain its principle of operation with in neat
diagram along with its input and output characteristics.
D. Explain CRO with the help of diagram. How can we measure phase and frequency using
CRO?
E. Define op-amp with the help of block diagram. Also draw its equivalent circuit. List the ideal
characteristics of op-amp.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
A (i) Find the range of RL and IL that will maintain a constant output voltage of 10V (Fig. 2)
(ii) Also determine the maximum wattage rating of the Zener diode for given circuit.
Fig. 2
B. Discuss the construction and working of tunnel diode. Also sketch its I-V characteristics and
explain.
4. Attempt any one part of the following: 7 x 1 = 7
A. For the voltage divider network shown below (Fig. 3), Given IDSS=10mA,Vp=-3.5 V,
determine VG, IDQ, VGSQ, VD,VS & VDSQ
Fig. 3
B. Determine the output waveform for the given network (Fig. 4). Determine the output dc
level and compute PIV for each diode.
Fig. 4
5. Attempt any one part of the following: 7 x 1 = 7
A. Draw the circuit of n-channel depletion type MOSFET & explain its operation. Also draw
its drain & transfer characteristics.
B. i. Explain the operation of op-amp as integrator.
ii Determine the output voltage for given op-amp circuit(Fig. 5).
Fig. 5
6. Attempt any one part of the following: 7 x 1 = 7
A. (i) Define Amplitude Modulation. Derive an expression for amplitude modulated wave.
(ii)A sinusoidal carrier of 1MHz and amplitude 100V is amplitude modulated by a sinusoidal
modulating signal of frequency 5 KHz providing 50% modulation. Calculate the frequency and
amplitude of USB and LSB.
B. (i) Sketch the output for given clamper circuit with shown input (Fig. 6).
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Printed Pages: 04 Sub Code: REC201
Paper Id: 131241 Roll No.
B.TECH
(SEM 2) THEORY EXAMINATION 2017-18
BASIC ELECTRONICS
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
A.?Derive the relationship between ? & ?.
B. The reverse saturation current of a Si p-n junction diode is 10 ?A at 300K.Determine the
forward bias voltage to be applied to obtain diode current of 100mA.
C. A Lissajous pattern on an oscilloscope is stationary and has 4 horizontal and 3 vertical
tangencies. The horizontal frequency is 50 Hz, find vertical frequency.
D. Explain the principle of operation of LED.
E. Describe how FET can be used as voltage variable resistor?
F. Sketch the circuit of op-amp as an integrator and differentiator.
G. The unmodulated r.m.s current of an AM wave is 8.93A and it increase to 11.25A with
modulation. Determine the modulation index.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
A. Explain the operation of full wave bridge rectifier with the help of a circuit diagram. Also
sketch the input and output waveforms. Define its PIV. Also derive its ripple factor and
rectification efficiency.
B. Define clipper circuit. Sketch the output waveform for the circuit shown below for given input
(Fig 1).
Fig. 1
C. Draw the basic structure of CB BJT and explain its principle of operation with in neat
diagram along with its input and output characteristics.
D. Explain CRO with the help of diagram. How can we measure phase and frequency using
CRO?
E. Define op-amp with the help of block diagram. Also draw its equivalent circuit. List the ideal
characteristics of op-amp.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
A (i) Find the range of RL and IL that will maintain a constant output voltage of 10V (Fig. 2)
(ii) Also determine the maximum wattage rating of the Zener diode for given circuit.
Fig. 2
B. Discuss the construction and working of tunnel diode. Also sketch its I-V characteristics and
explain.
4. Attempt any one part of the following: 7 x 1 = 7
A. For the voltage divider network shown below (Fig. 3), Given IDSS=10mA,Vp=-3.5 V,
determine VG, IDQ, VGSQ, VD,VS & VDSQ
Fig. 3
B. Determine the output waveform for the given network (Fig. 4). Determine the output dc
level and compute PIV for each diode.
Fig. 4
5. Attempt any one part of the following: 7 x 1 = 7
A. Draw the circuit of n-channel depletion type MOSFET & explain its operation. Also draw
its drain & transfer characteristics.
B. i. Explain the operation of op-amp as integrator.
ii Determine the output voltage for given op-amp circuit(Fig. 5).
Fig. 5
6. Attempt any one part of the following: 7 x 1 = 7
A. (i) Define Amplitude Modulation. Derive an expression for amplitude modulated wave.
(ii)A sinusoidal carrier of 1MHz and amplitude 100V is amplitude modulated by a sinusoidal
modulating signal of frequency 5 KHz providing 50% modulation. Calculate the frequency and
amplitude of USB and LSB.
B. (i) Sketch the output for given clamper circuit with shown input (Fig. 6).
Fig.6
(ii)Sketch v0 for given circuit configuration (Fig. 7):
Fig. 7
7. Attempt any one part of the following: 7 x 1 = 7
A. Using suitable diagram explain the basic principle of digital multimeter (DMM).Also list its
applications.
B. (i) Explain Double Sideband Suppressed Carrier (DSB- SC) Techniques.
(ii)Compare Amplitude Modulation (AM), Frequency Modulation (FM) and Phase Modulation
(PM).
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This post was last modified on 29 January 2020