Roll No.
Total No. of Pages : 02
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Total No. of Questions : 07
B.Sc.(CS) (2013 & Onwards) (Sem.-4)
QUANTUM MECHANICS
Subject Code : BCS-404
M.Code : 72320
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Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains SIX questions carrying TEN marks each and a student has to attempt any FOUR questions.
SECTION-A
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- Answer briefly :
- Why cannot we observe de-Broglie wavelength with a fast moving cricket ball?
- Calculate the de-Broglie wavelength of 1 MeV proton.
- What does the square of wave function signify?
- Explain the terms ‘expectation value’ and ‘eigen value’.
- What is the importance of normalizing a wave function?
- Prove quantum mechanically that a particle will not exist in a box if its energy is zero.
- What is Tunnel effect?
- Explain ‘Auger effect’.
- State and explain Moseley’s law.
- What are Stoke’s lines?
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SECTION-B
- Explain formation of a Gaussian wave packet. Plot graphically and explain its properties.
- What do you mean by normalized wave function? Elaborate relationship between normalization and conservation of probability.
- Explain probability current and probability density. Show that the change in probability density in a region of space is equal to the net change in probability current into that region.
- Solve the Schrodinger's wave equation for a particle in one dimensional rectangular potential well of finite depth.
- How X-rays are produced? Distinguish between continuous and characteristic X-ray spectra. Why are the characteristic spectra so called?
- Show vibrational and rotational energy levels of a diatomic molecule on a potential energy versus inter-atomic distance curve. Explain the formation of these levels.
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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-Sc CS-IT 2020 March Previous Question Papers