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 crystal studies.
It is divided into three sections assessing definitions, derivations, numericals, and conceptual explanations.

SECTION – A (10 × 2 = 20 Marks)

This section contains ten short questions, each requiring a brief definition or explanation.
Topics include:

Polar vs non-polar dielectrics

Magnetic induction & magnetization intensity

Depth of penetration (skin depth)

Maxwell’s displacement current

Intrinsic semiconductors

Superconductivity

Nanoscience & nanotechnology

Bragg’s law in X-ray diffraction

High-temperature superconductors

Relation between E, P, and D vectors in dielectrics

This section evaluates foundational concepts in modern physics and materials science.

SECTION – B (5 × 10 = 50 Marks)

Students must answer any five descriptive or numerical questions.
Topics include:

Electric field inside a dielectric & Clausius–Mossotti equation

Langevin’s theory of diamagnetism; negative & temperature-independent susceptibility

Dielectric constant and susceptibility numerical

Magnetic moment of an iron rod inside a solenoid

Bragg’s law calculation for higher order diffraction

Poynting vector & electromagnetic energy flow

Type-I and Type-II superconductors; properties changing during transition

Effect of magnetic field on superconducting transition; numerical for Pb

This section tests derivations, theoretical reasoning, and applied physics numericals.

SECTION – C (2 × 15 = 30 Marks)

Students must attempt any two long-answer questions.

Carbon Nanotubes

Definition, structure

CVD (Chemical Vapour Condensation) method of synthesis

Radiation intensity numerical using lamp power

Polarization in Dielectrics

Definition of polarization

Different mechanisms: electronic, ionic, dipolar, space-charge

Bragg’s Spectrometer

Construction and working

Derivation of Bragg’s formula

Application in studying crystal structure

This section evaluates deep conceptual understanding, long derivations, and real-world physics applications.