This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
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Roll No. [ ] [ ] [ ] [ ] Total No. of Pages : 02
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Total No. of Questions : 18B.Tech. (Electrical & Electronics)/(Electrical Engineering)/
(Electronics & Electrical)(Sem.-5)
ELECTRICAL ENGINEERING MATERIALS
Subject Code : BTEE-504A-18
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M.Code : 78703Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
Answer briefly :
- What do you understand by permeability?
- What is meant by hysteresis loss?
- What are N-type semiconductors? Give examples.
- What are bimetals? Give examples.
- What are paramagnetic materials? Also give examples of paramagnetic materials.
- Mention the characteristics of a good insulating material.
- Explain the Seebeck effect.
- What do you mean by Ferroelectricity?
- What is Resistance? On what factors does it depend?
- Explain Hall effect.
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SECTION-B
- What do you mean by a thermo-couple? Explain the construction and working of a thermo-couple.
- State and explain main factors which decide selection of an insulating material for a particular purpose.
- How can the materials be classified on the basis of energy bands? Discuss.
- Explain the term electrical conductivity. Also discuss effect of temperature on electrical conductivity of metals.
- Explain Curie point and Retentivity of magnetic materials.
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SECTION-C
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- Write a note on following:
- Photo electric emission
- Polarization
- What do you mean by Dielectrics? Discuss the effect of a dielectric on the behavior of a capacitor. Explain the term dielectric constant and also discuss about the dielectric constant of monatomic gases. Name any two dielectric materials used in electrical machines.
- Write a note on following:
- Classical theory of electrical and thermal conduction in solids.
- Electrical conductivity of doped materials.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University