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Gujarat Technological UniversitySummer 2025 Examination

GTU 3110016 Basic Electronics (BE) Summer 2025 Paper Solution & PDF

B.E. · Common Engineering · Semester 1 · Subject Code: 3110016
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)
Draw and explain constructional details and symbols for BJT.
3 Marks
(b)
Draw and explain the V/I characteristics of a practical diode.
4 Marks
(c)

Draw Common Base configuration and discuss its input and output characteristics with ICBO, ri, ro, and current gain α.

7 Marks

Question 2

14 MarksMedium
(a)
Define: clipper, Clamper, PIV of a Diode.
3 Marks
(b)
Compare different rectifier circuits.
4 Marks
(c)
Discuss diode approximations.
7 Marks
OR OPTION
(c)

Explain full wave center-tape rectifier in detail with waveforms and derivation of average output voltage.

7 Marks

Question 3

14 MarksMedium
(a)
Draw circuit diagram of positive clamper and explain the operation.
3 Marks
(b)
Draw and explain circuit of AND gate using diodes.
4 Marks
(c)
Explain thermal stability of BJT with stability factors S, S’, S’’.
7 Marks
OR OPTION
(a)
Draw Hybrid equivalent model of transistor for CB, CE, CC configurations.
3 Marks
(b)
Describe LED with its applications.
4 Marks
(c)
Discuss operation and applications of PIN Photo diode and Solar cell.
7 Marks

Question 4

14 MarksMedium
(a)
State the difference between Avalanche breakdown and Zener breakdown.
3 Marks
(b)
Discuss seven segment display with its types.
4 Marks
(c)
Explain biased positive and negative clipper circuits in detail.
7 Marks
OR OPTION
(a)
For a BJT, αdc is 0.98 and base current is 50 μA, then find βdc , IC & IE.
3 Marks
(b)
Compare CB, CE, CC configurations.
4 Marks
(c)
Draw Emitter follower circuit and discuss its input and output characteristics.
7 Marks

Question 5

14 MarksMedium
(a)
Compare BJT & FET.
3 Marks
(b)
Explain OR gate using diodes.
4 Marks
(c)
Describe MOSFET operation and draw the structures for D-MOSFET & E-MOSFET.
7 Marks
OR OPTION
(a)
Discuss FET as an amplifier.
3 Marks
(b)
Compare different logic families.
4 Marks
(c)

Explain Drain characteristics and Transfer characteristics of JFET in detail with all related terms as Transconductance, drain resistance and amplification factor.

7 Marks
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About this Examination Paper & Attribution

Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Basic Electronics (BE) (Summer 2025, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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