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Important Questions for "b.sc,physics":

[1]

  1. Explain the biophysical principles of ultra-filtration.
  2. What is stereo isomerism? Explain with examples.
  3. Discuss electrical properties of biological membranes.

[2]

  1. Explain the scope and methods of Biophysics.
  2. Briefly explain the biophysics of vision, hearing, sense of balance, and rotation.
  3. Give notes on the electrical property of membranes.

[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) Defects of vision and corrections (b) Water as a universal solvent.
  3. Discuss the light-dependent reaction of photosynthesis in plants and microbes.

[5]

  1. Write short notes on: (a) Relationship between Physics and Biology (b) Properties of open system.
  2. What is photoreception? What are photoreceptor proteins? Discuss the different types of photoreceptors.
  3. Explain the mechanism of energy transfer during respiration.

[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. Explain chirality and its uses in biomolecules.

[7]

  1. Explain the following: (a) Enzyme-substrate reactions (b) Antigen-antibody interactions.
  2. Explain intra- and inter-nuclear interactions in biological systems.
  3. Explain the laws of thermodynamics. How do they apply to biological systems?

[8]

  1. Explain the classical statistics and their application to systems of particles.
  2. What are quantum statistics and under what conditions do they resemble classical statistics?
  3. Write notes on relativity concepts including length contraction and relativistic energy.

[9]

  1. What are the fundamental laws of Physics in inertial frames?
  2. What principle is the Michelson-Morley experiment based on?
  3. How does the Fermi energy of a free electron gas depend on electron density?

[10]

  1. Describe pair production and its energy conditions.
  2. Explain the spin of hyperon.
  3. Explain the conditions under which nuclear fusion reactions take place.

[11]

  1. What determines diode behavior in circuits with varying potentials?
  2. How is critical wavelength calculated for photo conductors?
  3. What is the reverse saturation current range for silicon?

[12]

  1. Define phenomenon of double refraction.
  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. State and prove maximum power transfer theorem.
  3. State and prove Norton's theorem. How is Norton's equivalent circuit related with the Thevenin's equivalent circuit?

[14]

  1. Write any four properties of Laser.
  2. What do you mean by diffraction?
  3. Explain the meaning of reactive power and power factor in AC (steady state) circuits.

[15]

  1. What are the postulates of special theory of relativity?
  2. Explain the concept of a phasor. How is it different from a vector?
  3. State and prove Thevenin's theorem.

[16]

  1. What are the characteristic properties of a laser beam?
  2. What is the velocity of mesons whose proper mean life is 2.510 seconds and observed mean life is 2.510 seconds?
  3. What are Einstein's coefficients? Describe the construction and working of Helium-Neon Laser.

[17]

  1. Deduce an expression for the gravitational self-energy of a spherical shell.
  2. Write the postulates of special theory of relativity.
  3. State and prove Gauss' Theorem.

[18]

  1. What is an electron gun?
  2. State Gauss' theorem and prove it.
  3. Write Biot-Savart's law. Use it to obtain the expression for the magnetic field at the center of a current circular coil.

[19]

  1. What is a tunnel diode? Draw its characteristic curve and explain its working with the help of an energy band diagram. Mention the application of tunnel diode.
  2. Explain the construction and working principle of a Unijunction Transistor (UJT) with its V-I characteristic curve.
  3. Write notes on distortion in amplifiers.

[20]

  1. Two states are in thermal contact. Deduce the conditions for thermal equilibrium and show that B = 1/KT.
  2. State the basic postulates of Einstein's theory of relativity and use them to obtain Lorentz transformations for frames in relative motion with constant velocity.
  3. Discuss the kinetic interpretation of temperature.

[21]

  1. What is the probability of getting two heads and one tail in a large number of coin tosses?
  2. What is the value of gamma (Y) for a molecule with n degrees of freedom?
  3. Which substance has hydrogen bonding?

[22]

  1. In a solid, how many degrees of freedom does an atom have?
  2. What is the fundamental interaction?
  3. What is the mass of deuteron in atomic mass units (a.m.u.)?

[23]

  1. State the postulates of special theory of relativity.
  2. Deduce an expression for the variation of mass with velocity. With the help of a graph, explain its experimental verification.
  3. Derive an expression for Maxwell-Boltzmann's distribution law for molecular speeds in an ideal gas. Obtain expressions for average speed, root mean square speed, and most probable speed.

[24]

  1. Derive the Barkhausen criterion for sustained oscillations.
  2. Convert hexadecimal number (49)16 to decimal equivalent.
  3. Simplify the given expressions using Boolean Algebra method.

[25]

  1. Discuss the Fermi level in intrinsic and extrinsic semiconductors.
  2. What is Field Effect Transistor (FET)? Why is it called unipolar transistor?
  3. What are Power Amplifiers? Write down the difference between Voltage and Power Amplifiers. Explain the working of class A power amplifier with suitable circuit diagram and output characteristic curve.

[26]

  1. Write a short note on emitter follower circuit.
  2. 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.
  3. What is MOSFET? Explain the construction and working of depletion type and enhancement type of MOSFET with their respective characteristic curves.

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