Gujarat Technological UniversitySummer 2025 examination

GTU 3160923 Electrical Materials Summer 2025 Question Paper & PDF

B.E. · Electrical Engineering · Semester 6 · Subject code 3160923
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
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Q.1

14 Marks
(a)
3 marks
What are the factors on which selection of conductor material depends?
(b)
4 marks
Explain effect of temperature on semiconductor.

Explain effect of temperature on semiconductor. Explain effect of temperature on semiconductor.

(c)
7 marks
Explain factors affecting the resistivity of conducting materials.

Q.2

14 Marks
(a)
3 marks

Why air is replaced by nitrogen as an insulating material in certain applications?

(b)
4 marks
Discuss properties of high resistivity material.
(c)
7 marks
Explain difference between hard and soft magnetic material.
(c)
7 marks
Discuss the thermal properties of an insulating materials.

Q.3

14 Marks
(a)
3 marks

Give reason why cores of transformer are made of silicon steel laminations.

(b)
4 marks
What is a super conductor? Explain the applications of super conducting materials.
(c)
7 marks
Write short notes on: mechanical and electrical properties of dielectric materials.
(a)
3 marks
Which are the applications of Soft Ferrites?
(b)
4 marks

Name four natural insulating materials. Mention their most important properties and their application.

(c)
7 marks
Write short note on magnetic hysteresis.

Q.4

14 Marks
(a)
3 marks
What do you mean by critical temperature in superconductivity?
(b)
4 marks
Explain how holes work as charge carriers.
(c)
7 marks
Write short notes on Radioactive materials
(a)
3 marks
Give classifications of semiconductors.
(b)
4 marks
Explain the difference between diamagnetic and paramagnetic materials.
(c)
7 marks
Compare type-I and type-II superconductors.

Q.5

14 Marks
(a)
3 marks
Which are the properties of High Frequency Materials?
(b)
4 marks
Write short notes on Galvanizing materials.
(c)
7 marks

What are refractory materials? Give applications of different types of refractory materials.

(a)
3 marks
Compare Copper and Aluminum conducting materials.
(b)
4 marks
Explain various properties of Nickel iron alloy.
(c)
7 marks
Write short notes on losses in magnetic materials.

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About this paper

Official Gujarat Technological University (GTU) examination paper for Electrical Materials (Summer 2025, B.E. · Electrical Engineering, Sem 6). 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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