BPHYS102 Applied Physics for CSE Set – 1 Solved Model Question Paper

BPHYS102 Set – 1 Solved Model Question Paper 1st/2nd Semester P Cycle for Computer Science and Engineering (CSE) Stream 22 Scheme

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MODULE – 1

1.A] Define LASER and Discuss the interaction of radiation with matter.

1.B] Define Acceptance angle and Numerical Aperture, and derive
an expression for NA in terms of refractive indices of core, cladding, and surroundings.

1.C] A LASER emits power of 10−310^{-3} W. Calculate the number of photons emitted per second given the wavelength is 692.8 nm.

OR

2.A] Illustrate the construction and working of a Semiconductor LASER with a neat sketch and energy level diagram. Mention applications.

2.B] Discuss the types of optical fibers based on:
i) Modes of Propagation
ii) Refractive Index profile

2.C] A fiber of length 1500 m has input power 100 mW and output power 70 mW.
Find the attenuation coefficient.

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MODULE – 2

3.A] Setup the Schrödinger time-independent wave equation in one dimension.

3.B] State and explain:
i) Heisenberg’s Uncertainty Principle
ii) Principle of Complementarity

3.C] An electron with kinetic energy 500 keV is in vacuum. Calculate: Group velocity and de Broglie wavelength (Assume the mass is equal to rest mass of electron)

OR

4.A] Discuss the motion of a quantum particle in a 1D infinite potential well of width ‘a’.
Obtain the eigenfunctions and energy eigenstates.

4.B] Explain the physical significance of the wave function.

4.C] The uncertainty in measuring the speed of an electron is 2×1042 \times 10^4 m/s.
What is the minimum width required to confine the electron in an atom?

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MODULE – 3

5.A] Define bit and qubit. Explain the properties of a qubit.

5.B] Discuss the CNOT gate and its operation on all four input states.

5.C] A linear operator XX acts such that:
X∣0⟩=∣1⟩X|0\rangle = |1\rangle, X∣1⟩=∣0⟩X|1\rangle = |0\rangle.
Find the matrix representation of XX.

OR

6.A] State the Pauli matrices and apply them to states ∣0⟩|0\rangle and ∣1⟩|1\rangle.

6.B] Elucidate differences between classical and quantum computing.

6.C] Describe the working of a controlled-Z gate with its matrix representation and truth table.

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MODULE – 4

7.A] Define the Fermi Factor and discuss its variation with temperature and energy.

7.B] Explain DC and AC Josephson effects. Mention applications of superconductivity in quantum computing.

7.C] Calculate the probability of occupation of an energy level 0.2 eV above Fermi level at 27°C.

OR

8.A] Describe the Meissner Effect and classify superconductors into soft and hard types using M-H graphs.

8.B] State the assumptions of quantum free electron theory of metals.

8.C] For Lead:
Transition temperature Tc=7.26T_c = 7.26 K,
Initial critical field at 0 K = 50×10350 \times 10^3 A/m.
Calculate critical field at 6 K.

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MODULE – 5

9.A] Discuss timing in animation:

• Linear motion
• Uniform motion
• Slow in and slow out

9.B] Differentiate between descriptive and inferential statistics.

9.C] Illustrate the Odd Rule and Odd Rule multipliers with a suitable example.

OR

10.A] Describe Jumping and its parts in animation.

10.B] Discuss the salient features of the normal distribution using bell curves.

10.C] A radioactive source emits particles with Poisson distribution where λ=4\lambda = 4.
Calculate:

• P(X=0)P(X = 0)
• P(X=1)P(X = 1)

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