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Important Questions for "b.sc,physics":

[1]

  1. Describe properties of open systems.
  2. Explain the kinetics of a simple enzymatic reaction.
  3. Describe the biomechanics of the cardiovascular system.

[2]

  1. Explain the scope and methods of Biophysics.
  2. Briefly explain the biophysics of vision, hearing, sense of balance, and rotation.
  3. Write short notes on pH.

[3]

  1. Explain the physics of the following: (a) Biophysics of water (b) Ultrafiltration
  2. What is the first and second law of thermodynamics? Explain their significance in biophysics.
  3. How does physics explain the formation of an image in the eye? Explain with a diagram.

[4]

  1. Discuss the internal structure and biophysics of stato-phono receptors.
  2. Write short notes on: (a) Colorimetry (b) Steroid hormone.
  3. Write short notes on: (a) Membrane potential (b) Charismatic hypothesis.

[5]

  1. Write short notes on: (a) Relationship between Physics and Biology (b) Properties of open system.
  2. What are enzymes? Explain enzyme-substrate interactions.
  3. What is photoreception? What are photoreceptor proteins? Discuss the different types of photoreceptors.

[6]

  1. Write short notes on: (i) Scope of Bio-Physics (ii) Properties of open systems.
  2. Write short notes on: (i) Relationship between Physics and Biology (ii) Electricity as a potential signal.
  3. Describe the conformational properties of enzymes.

[7]

  1. Draw the structure of the human eye. Explain its working and defects.
  2. What are high-energy biomolecules? Explain their role in energy transductions.
  3. Explain the following: (a) Enzyme-substrate reactions (b) Antigen-antibody interactions.

[8]

  1. Define the range of the probability of an event.
  2. Explain the classical statistics and their application to systems of particles.
  3. Explain Fermi energy and factors it depends upon.

[9]

  1. What are the fundamental laws of Physics in inertial frames?
  2. What principle is the Michelson-Morley experiment based on?
  3. What does an observer at rest feel when a watch is moving at the speed v = c?

[10]

  1. Explain the spin of hyperon.
  2. Describe the Miller indices for a plane that makes specific intercepts along given axes.
  3. Explain the conditions under which nuclear fusion reactions take place.

[11]

  1. What type of gain is associated with reverse voltage in transistors?
  2. Why is silicon preferred over germanium in semiconductors?
  3. How does a solar cell function?

[12]

  1. Write any three applications of Laser.
  2. What are Newton's rings? How are they formed? Show that in reflected light diameter of bright rings is proportional to square root of odd numbers.
  3. State and prove superposition theorem.

[13]

  1. Define dispersive power of a grating and obtain an expression for it.
  2. Write basic postulates of special theory of relativity and deduce the Lorentz transformation from the postulates.
  3. Explain the phenomenon of diffraction of light. Explain the difference between Fresnel and Fraunhofer diffraction phenomena and distinguish clearly between interference and diffraction of light.

[14]

  1. Write any four properties of Laser.
  2. Define time dilation, and derive the formula for time dilation.
  3. What are Newton's rings? How are they formed? Prove that in reflected light, diameters of bright rings are proportional to the square root of odd natural numbers.

[15]

  1. Write any four conditions to obtain well-defined interference.
  2. Write the expressions for average value and RMS value of a half-wave rectified sinusoidal voltage.
  3. What is meant by the resolving power of an optical instrument? Explain Rayleigh's criterion for just resolution.

[16]

  1. The total energy of a particle is exactly twice its rest energy. Find its speed.
  2. Show that the time for attaining half the value of the final equilibrium (maximum) current in a circuit having an inductance L and a resistance R in series is 0.69 L/R.
  3. What is the velocity of mesons whose proper mean life is 2.510 seconds and observed mean life is 2.510 seconds?

[17]

  1. Explain Michelson-Morley's experiment in detail.
  2. State and prove Gauss' Theorem.
  3. What do you mean by length contraction at relativistic speeds? Deduce the necessary expression.

[18]

  1. What do you understand by Lorentz Force?
  2. What is meant by impedance of an electric circuit? What is a linear impedance?
  3. What is meant by dielectric material? How is it different from a conductor material?

[19]

  1. Distinguish between junction field effect transistor and bipolar junction transistor.
  2. Derive an expression for the densities of free electrons and holes in an intrinsic semiconductor. Show that the Fermi level lies halfway between the conduction and valence band.
  3. Write notes on base-width modulation in a transistor.

[20]

  1. Show that the length of a rod is invariant under Galilean transformation.
  2. Write the assumptions of Fermi-Dirac statistics.
  3. Give the quantum mechanical theory of linear harmonic oscillator and obtain an expression for its zero-point energy.

[21]

  1. Which speed is most closely related to the kinetic energy of molecules?
  2. To which statistics does Pauli's exclusion principle apply?
  3. Which symmetry is not compatible with crystal symmetry?

[22]

  1. In a solid, how many degrees of freedom does an atom have?
  2. What is the fundamental interaction?
  3. How many sulphide atoms are there in the unit cell of a zinc sulphide crystal?

[23]

  1. Show that the expression x^2 + y^2 + z^2 - c2t2 is invariant under Lorentz transformation.
  2. Deduce an expression for the variation of mass with velocity. With the help of a graph, explain its experimental verification.
  3. Deduce Einstein's mass-energy relation E = mc^2 and discuss it. Give two evidences showing its validity.

[24]

  1. Explain the formation of barrier field across the p-n junction diode. Derive the equation for the width of depletion layer and height of potential barrier.
  2. Draw the circuit of R-C coupled CE amplifier and explain its frequency response curve at different frequency ranges. Why does the gain decrease in low and high frequency ranges?
  3. Simplify the given expressions using Boolean Algebra method.

[25]

  1. Explain the formation of barrier field across the p-n junction diode. Derive the equation for the width of depletion layer and height of potential barrier.
  2. Explain the working of tuned collector oscillator with circuit diagram and derive the equation for its frequency of oscillation.
  3. Simplify the given expressions using Boolean Algebra method.

[26]

  1. Explain the depletion layer in p-n junction diode with suitable diagram.
  2. Explain the Kronig-Penny model. Derive the equation for the energy of an electron in one-dimensional periodic potential.
  3. Find out the expression for input impedance, output impedance, current gain, voltage gain and power gain in terms of h-parameters for CE amplifier.

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