BRANCH- ELECTRICAL & ELECTRONICS
SEMESTER = IV TH
EEM-(EX-402)
UNIT-1
Q.1 defines the term resistivity. Explain the factor affecting the resistivity of electrical materials.
Q.2Explain the following.
(a) Conductor for overhead transmission line and
(b) Conductor used for underground transmission line.
Q.3 what is super conductor explain the property of super conductor.
Q.4 explains the working principle of fuel cell generator.
Q.5 explain the property of following material
(a) copper
(B) steel
UNIT-2
Q.6 explains the term LASER. Also give application of laser.
Q.7 define Hall Effect generator.
Q.8 explains the working of photo conductive cell.
Q.9 explains the working of photo voltaic cell.
Q.10 what is strain gauge explain it .
UNIT-3
Q.11 Define permittivity & polarization of Dielectric materials.
Q.12 Classify different type of capacitors & which type of materials is used for them.
Q.13 What is Insulating material? Define their properties.
Q.14 How piezo electric work? What are the essential property of a piezoelectric material.
Q.15 Name the different categories of insulation materials. Also give some examples.
Q.16What do you understand by the term dielectric strength of a material? Explain.
Q.17 What is polarization.
Q.18Explain the following terms:1) Electric flux Density.
2) Permittivity.
3) Electric Field Intensity.
Q.19 What are the various solid dielectric materials.
Q.20Calculate the capacitance of a condenser which has plates of 0.2 m2 in area separated by a
distance of 2.5*10-5 meters, the dielectric having permittivity of 5.0.
Q.21Write short notes on the following:1) Gaseous Dielectric.
2) Liquid Dielectric.
Q.22What is the function of oil inside the transformer? Also explain how we can determine
the dielectric strength of transformer oil.
UNIT-4
Q.23 Give classification of magnetic materials. Also explain what are different losses which
occur in magnetic material?
Q.24 Explain soft and hard magnetic materials. What is soldering, give some examples of solder
materials with their composition?
Q.25What is B-H curve. Draw B-H curve for different magnetic materials?
Q.26Write short notes on the following(any 4):i) Magnetostrictioin.
ii) Fuses.
iii) Galvanizing & Impregnation .
iv) Thermo couple.
v) Fluorescent & Phosphorescent.
UNIT-5
Q.27 Discuss the fabrication processes of BJT?
Q.28Explain monolithic diodes in details?
Q.29Write an explanatory note on IC resistor & Capacitors?
Q.30Explain characteristic of IC components?