THEORY EXAMINATION (SEM–II) 2016-17 ENGINEERING PHYSICS-II

This question paper covers key concepts of dielectrics, magnetism, electromagnetism, semiconductors, superconductivity, nanoscience, X-ray diffraction, and electromagnetic waves.
It is divided into three sections that assess definitions, derivations, numerical skills, and conceptual understanding.

SECTION – A (10 × 2 = 20 Marks)

This section contains ten short-answer questions, requiring brief definitions or explanations.
Topics include:

Polar vs non-polar dielectrics

Magnetic induction and magnetization

Skin depth / depth of penetration

Maxwell’s displacement current

Intrinsic semiconductor

Superconductivity

Nanoscience & nanotechnology

Bragg’s law

High-temperature superconductors

Relation between E, P, and D vectors

This section checks fundamental terminology and core principles.

SECTION – B (5 × 10 = 50 Marks)

Students must attempt any five descriptive and numerical questions.
Topics include:

Electric field inside a dielectric & Clausius–Mossotti equation

Langevin’s theory of diamagnetism; negative susceptibility

Dielectric constant and susceptibility calculation

Magnetic moment of an iron rod inside a solenoid

Bragg diffraction angle for higher order reflections

Poynting vector & electromagnetic energy flow

Type-I & Type-II superconductors; properties during transition

Dependence of critical temperature on magnetic field; numerical for Pb

This section tests derivations, theory explanations, and physics numericals.

SECTION – C (2 × 15 = 30 Marks)

Students must attempt any two detailed questions.
Topics include:

Carbon Nanotubes (CNT)

Structure and types

CVD technique for synthesis

Numerical on electromagnetic radiation from a lamp

Polarization

Meaning and importance

Different polarization mechanisms in dielectrics (electronic, ionic, dipolar, interfacial)

Bragg’s Spectrometer

Construction and working

Derivation of Bragg’s formula

Use in determining crystal structure

This section evaluates analytical understanding and detailed application of concepts in modern physics.