Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech. (Bio Tech) (2018 & Onwards) (Sem.-1,2)
INTRODUCTION TO PHYSICS : BIOTECHNOLOGY
Subject Code : BTPH-107-18
M.Code : 75369
Time : 3 Hrs. Max. Marks : 60
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INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION -B & C have FOUR questions each. Attempt any FIVE questions from SECTION B & C carrying EIGHT marks each.
- Select atleast TWO questions from SECTION - B & C.
SECTION-A
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Answer briefly :
- State the principle and working of a laser.
- Explain the conditions for total internal reflection phenomena.
- Mention various fiber parameters.
- Differentiate between soft and hard magnetic materials.
- Differentiate between type-I and type-II superconductors.
- Justify that “Meissner effect is the true verification of superconducting state”.
- Give the difference between continuous and characteristic X-rays.
- Mention properties of ultrasound waves.
- Explain the concept of wave-particle duality.
- What is the difference between a quantum wire and quantum dot?
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SECTION-B
- a) Explain the construction, working and energy diagram of Ruby laser. 5
b) Discuss some medical applications of lasers. 3 - a) Discuss the construction and working of step and graded index fibers. 5
b) Discuss different losses associated with optical fibers and their control. 3 - a) Make a comparison between the characteristics of dia, para, ferro, ferri and ferrite magnetic materials. 5
b) Explain the phenomena of magnetostriction and mention its few applications. 3 - a) Discuss the superconducting state and its various properties. 4
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b) Give a brief account of BCS theory of superconducting state. 4
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SECTION-C
- Give an account of the properties of X-rays and discuss the method of their production. 8
- a) Explain the principle and working of ultrasound generator. 5
b) Mention the adverse effect of ultrasound waves. 3 - a) Write a short note on de-Broglie waves and their properties. 3
b) Give definitions of Photoelectric effect and Compton Effect. 3
c) Calculate the frequency and wavelength of a photon whose energy is 75eV. 2 - a) Discuss the top-down and bottom-up methods of nanoparticles synthesis. 4
b) What are carbon nanotubes? Discuss how various types of carbon nanotubes can be formed from graphene? 4
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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.Tech Question Papers 2020 December (All Branches)