Physics-I (Gr-A) 2024 — MAKAUT · BS-PH101 · Mid Sem PYQ with solutions

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Maulana Abul Kalam Azad University of Technology

Solutions

34 answers across 3 groups

Try each question first, then open it to check your answer.

Group AVery Short Answer Type Question · answer any 10 · 1 mark each

  1. I

    What is the emissivity of an ideal black body?

    Free sample

    Answer: 1

    Explanation

    An ideal black body absorbs all incident radiation, and by Kirchhoff's law, it is also a perfect emitter, so its emissivity is exactly 1.

  2. II

    What is the dimension of phase space?

  3. III

    The Curl of a conservative vector field is _______.

  4. IV

    In Fraunhofer diffraction, the incident wavefront is _______.

  5. V

    The displacement current arises due to _______.

  6. VI

    For an ideal blackbody, the power emitted per unit area is proportional to _______.

  7. VII

    At absolute zero temperature what is the probability of occupancy of an electron in an energy state above the Fermi level?

  8. VIII

    Find the angle between the vectors i^\hat{i} and 2i^+j^2\hat{i} + \hat{j}

  9. IX

    Diffraction is actually a form of interference. True or False?

  10. X

    Dimension of polarizability in SI units is _______

  11. XI

    If E1E_1 be the energy of the ground state of a 1 dimensional potential well of length L and E2E_2 be the energy of the ground state of a 1 dimensional potential well of length L/2, what is the relation between E1E_1 and E2E_2?

  12. XII

    What is the average energy of electrons in a metal at 0 Kelvin?

Group BShort Answer Type Question · answer any 3 · 5 marks each

  1. 2

    State five applications of LASER

  2. 3

    Mention the criteria for the applicability of Bose-Einstein statistics.

  3. 4

    Find the value of the given Commutator and explain the significance of the result [x^,px^][\hat{x}, \hat{p_x}]

  4. 5

    What do you mean by Macrostate and Microstate? –Explain with suitable example.

  5. 6

    Compute the smallest possible uncertainty in the position of an electron moving with speed 30000000 metres per second.

Group CLong Answer Type Question · answer any 3 · 15 marks each

  1. 7(a)

    Give one example of Solid, Liquid and Gaseous Dielectric material

    3 marks
  2. 7(b)

    State three applications of Dielectric Materials

    3 marks
  3. 7(c)

    What is Dielectric Constant? What is its value in vacuum and conductor?

    4 marks
  4. 7(d)

    A capacitor is made up of a dielectric material of ϵr=4.2\epsilon_r=4.2. It has an effective surface area of 0.09m20.09\text{m}^2 and capacitance of 10μF10\mu\text{F}. Calculate the field strength if a potential difference of 5V exists across the capacitor. Given ϵ0=8.85×10−12 Fm−1\epsilon_0=8.85 \times 10^{-12}\ \text{Fm}^{-1}

    5 marks
  5. 8(a)

    State the Planck's radiation law explaining all terms and show that the law reduces to the Wien's radiation law and Rayleigh Jeans law in opposite limits.

    6 marks
  6. 8(b)

    Define group velocity and Phase velocity. Show that the product of group velocity and phase velocity is a constant.

    5 marks
  7. 8(c)

    Write down the time dependent Schrodinger equation clearly mentioning the terms. Explain the physical significance of a wave function

    4 marks
  8. 9(a)

    A particle is executing simple harmonic oscillation and has a velocity of 5m/s when the displacement is 2m and reduces to 2m/s when the displacement is 5m. Calculate i) Amplitude ii) Frequency iii) Time period of the above oscillation

    8 marks
  9. 9(b)

    Define holonomic and non holonomic Constraints with examples of each

    4 marks
  10. 9(c)

    What is a conservative vector field? Give one example

    3 marks
  11. 10(a)

    Compare diamagnetic, paramagnetic and ferromagnetic materials

    6 marks
  12. 10(b)

    Differentiate between Soft and Hard magnetic materials

    3 marks
  13. 10(c)

    The value of permeability of a material is 0.12 N/A20.12\ \text{N/A}^2. What is the relative permeability and magnetic susceptibility?

    4 marks
  14. 10(d)

    Define magnetic domain of ferromagnetic materials.

    2 marks
  15. 11(a)

    Find the minimum number of lines of a grating which can resolve in the second order spectrum of two lines having wavelengths 5890 Angstrom and 5896 Angstrom.

    5 marks
  16. 11(b)

    Two polarisers are placed at crossed position. At what angle should a third polariser be placed so that the intensity of the emergent light is one-fourth of the intensity of incident light?

    5 marks
  17. 11(c)

    What is the highest order spectrum which may be observed with monochromatic light of wavelength 200 nm by using a grating with 2000 lines/cm

    5 marks

About this paper

The MAKAUT Physics-I (Gr-A) (BS-PH101) 2024 Mid Sem previous year question paper, set in semester 1. Download the verified PDF or read it online, then check your answers against the worked solutions above.

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What is the subject code for Physics-I (Gr-A)?

BS-PH101 is the MAKAUT subject code for Physics-I (Gr-A).

Which exam is this Physics-I (Gr-A) question paper from?

The MAKAUT 2024 Mid Sem exam, semester 1. A student shared it, and it was checked before publishing.

Which branches is this Physics-I (Gr-A) paper for?

It's a common paper for 8 B.Tech branches: Civil Engineering, Computer Science and Engineering, Computer Science and Engineering (Data Science), Electronics and Communication Engineering, Electrical Engineering, Mechanical Engineering, Information Technology and Computer Science and Engineering (Artificial Intelligence and Machine Learning). Every branch gets the same questions.

Where can I find more BS-PH101 question papers?

On the Physics-I (Gr-A) subject page, which collects every year's papers along with notes and the syllabus.

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