LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034B.Sc. DEGREE EXAMINATION – PHYSICSFOURTH SEMESTER – NOVEMBER 2003 PH 4201 / PHY 201 PHYSICS FOR CHEMISTRY
08.11.2003 100 Marks 1.00 – 4.00 |
SECTION – A
Answer ALL questions (2 x 10 = 20 marks)
- What is a polarimeter?
- What is diffraction?
- Give expressions for the combined capactiance of three capacitors connected in (I) series (ii) parallel.
- State Lenz’s law.
- Define half-life period of a radioactivity substance
- State Pauli’s exclusion principle.
- List any four characteristics of an operational amplifier.
- Sketch an half-adder.
- What is Crystal lattice?
- Define packing factor.
SECTION – B
Answer any FOUR questions (7.5 x 4 = 30 marks)
- Discuss in detail polarisation by reflection.
- Derive an expression for the energy stored by a charged capacitor.
- Explain the binding energy of a nucleus and derive an expression for the same.
- With a need sketch derive an expression for the gain of an inverting amplifier using an operational amplifiers.
- Tabulate the main characteristics of the seven crystal systems.
SECTION – C
Answer any FOUR questions: (12.5 x 4 = 50 marks)
- Explain how a plane transmission grating can be used to determine the wave length of a spectral line.
- Explain with necessary theory how a Carey-Foster bridge may be used to compare two nearly equal resistances.
- State Bohr’s postulates of hydrogen atom model. Obtain expressions for the radius and energy of the nth
- Realise operational amplifier as
- adder (b) differentiator (c) integrator
- How are lattice parameter of a crystal found using Bragg’s x-ray spectrometer?
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