This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university
B.Sc. Part-II (Semester-III) Examination
ELECTRONICS
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(Electronics Devices and Circuits)
Time : Three Hours] [Maximum Marks : 80
Note :— (1) Question No. 1 is compulsory.
(2) Draw neat diagrams wherever necessary.
- (A) Fill in the blanks with correct word : 2
- In ideal Op-Amp value of input impedance is __________
- Bistable multivibrator has __________ stable states.
- D/A is known as __________
- Voltage gain of Non-inverting amplifier is __________
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- (B) Choose the correct alternative : 2
- In ideal Op-Amp bandwidth is :
- Zero
- Minimum
- Infinite
- None
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- The monostable multivibrator has __________ stable state(s).
- 2
- 1
- 3
- 4
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- One of the following is not an oscillator :
- Colpitts
- Wein bridge
- Push pull
- Hartley
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- Op-Amp IC 741 has total __________ pins.
- 2
- 6
- 14
- 8
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- In ideal Op-Amp bandwidth is :
- (C) Answer the following questions in ONE sentence : 4
- What is feedback ?
- List the hybrid parameters.
- Define CMRR.
- What is oscillator ?
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EITHER
- (A) Give the advantages and disadvantages of direct coupled amplifier. 4
- (B) Draw hybrid equivalent circuit for CE transistor amplifier and derive the expression for
- Current gain
- Input impedance for CE-transistor amplifier. 8
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OR
- (P) Explain the working of single tuned amplifier with circuit diagram.
- (Q) State the advantages and disadvantages of RC coupled amplifier. 4
- (A) Explain the construction and working of Class B push pull amplifier. Find its efficiency. 8
- (B) Explain cross over distortion. How it is eliminated ? 4
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OR
- (P) Draw a circuit diagram of transformer coupled Class A amplifier and derive expression for its efficiency. 8
- (Q) Give the classification of amplifiers. 4
EITHER
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- (A) Explain Barkhausen criterion for sustained oscillations. 4
- (B) Explain the construction and working of Hartley oscillator. 8
OR
- (P) Explain the construction and operation of RC-phase shift oscillator using transistor. State its advantages. 8
- (Q) State the advantages of negative feedback. 4
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EITHER
- (A) Explain the working of Op-Amp as non-inverting amplifier and derive the expression for voltage gain. 6
- (B) With suitable diagram explain the working of Op-Amp as summing amplifier. 6
OR
- (P) Explain the concept of virtual ground in Op-Amp. 4
- (Q) Define :
- Common mode voltage gain
- Differential mode voltage gain.
- (R) Draw the block diagram of Op-Amp and explain the function of each block. 6
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EITHER
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- (A) Explain the construction and working of Op-Amp as a monostable multivibrator. 6
- (B) Explain how Op-Amp is used as damped harmonic oscillator. 6
OR
- (P) Explain the working of Op-Amp as a Schmitt Trigger. 6
- (Q) Explain the working of Op-Amp as an astable multivibrator. 6
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EITHER
- (A) Explain the working of successive approximation type A/D converter. 8
- (B) Explain the terms
- D/A Accuracy
- D/A Resolution. 4
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OR
- (P) Describe the construction and working of Weighted Resistor type D/A Converter. 6
- (Q) Explain the need of D/A and A/D converter. 4
- (R) What is A/D and D/A converter ?
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This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university