**Important RGPV Question, **

Table of Contents

Toggle**BT-201, Engineering Physics, 1st Year**

**UNIT-1 Wave Nature of Particles & The Schrodinger Equation**

**Q. 1)**Β Explain the Heisenbergβs uncertainty principle in detail.

Or

Discuss uncertainty principle and give one proof.

Or

State and explain Heisenbergβs uncertainty principle.

Or

State Heisenbergβs uncertainty principle and derive it for hypothetical gamma ray microscope **(RGPV Dec.2022, RGPV Jun 2022,2017,2012, RGPV May 2019,2018)**

**Q. 2)**Β Deduce the relation between phase and group velocities. **(RGPV Dec.2022)**

**Q. 3)**Β Discuss the physical significance of wave function. **(RGPV Jun 2022)**

**Q. 4)**Β Deduce the energy Eigen values and wave function of a particle moving in one dimensional box. **(RGPV Jun 2022)**

**Q. 5)**Β Deduce expression for energy of a particle trapped in one dimensional box. **(RGPV Jun 2020)**

**Q. 6)**Β Establish relation between Ug and Up. **(RGPV Jun 2020)**

**Q. 7)****Β **Obtain the time independent Schrodinger wave equation.

Or

Derive time dependent Schrodinger wave equation.

Or

State time independent Schrodinger equation and obtain the wave function for a particle in one dimensional potential well. **(****RGPV Dec.2022, RGPV Jun 2022, RGPV Jun 2020, RGPV Jun 2011, RGPV May 2018)**

**Q. 8)**Β Explain relation between phase and group velocities. **(RGPV Jun 2020)**

**Q. 9)**Β Give expression for momentum operator. **(RGPV Jun 2020)**

**Q. 10)**Β Discuss the concept of de-Broglie matter waves. **(RGPV Dec 2010, RGPV Jun 2015)**

**Q. 11)**Β Write short notes on (a) Physical significance of wave function (b) Youngβs double slit experiment **(RGPV Dec.2022)**

**Q. 12)****Β **Derive the expression for Compton shift in a Compton scattering process.

Or

Obtain the expression for Compton shift in wavelength of incidence radiation in Campton scattering.

Or

Explain Compton scattering.

Or

Explain Compton scattering. Find the value of wavelength of scattered photon. What Compton wavelength. **(RGPV Dec 2016,2017,2012, RGPV Jun 2016,2011, RGPV May 2018, RGPV Nov 2018)**

**UNIT-2 Wave Optics**

**Q. 1)**Β Explain Newtonβs ring method to determine the wavelength of sodium light. IN Newtonβs ring shows the diameter of 4th and 12th dark rings are 400cm and 700cm. Find the diameter of 20th dark ring.

Or

In Newtonβs rings experiment the diameter of the 4th and 12th dark rings are 0.400 cm and 0.700 cm respectively. Find the diameter of 20th dark ring in the same experiment arrangement.Β **(RGPV Dec 2020, RGPV May 2018)**

**Q. 2)**Β How the Newtonβs rings are formed ? Deduce the expression for diameter of dark and bright fringes. **(RGPV Dec.2022)**

**Q. 3)**Β Discuss the construction and working of Michelson interferometer.**Β ****(RGPV Jun 2022)**

**Q. 4)**Β Discuss Rayleigh criterion of resolution.

Or

Explain Rayleigh criterion for resolving power. **(RGPV Nov 2018, 2007)**

**Q. 5)**Β Explain Fraunhofer diffraction from a single slit. **(RGPV Jun 2020)**

**Q. 6)**Β Describe the construction and working of Mach-Zehnder interferometer. **(RGPV Dec.2022)**

**Q. 7)**Β Explain about the diffraction grating. A parallel beam of sodium light incident on plane transmission grating having 4250 lines per centimeter and a second order spectral line is observed at an angle of 300. Find the wave length of Sodium light. **(RGPV Dec.2022)**

**Q. 8)**Β What is superposition of waves ? Explain constructive and destructive interference. **(RGPV Jun 2022)**

**Q. 9)**Β Explain the formation of Newtonβs rings. Obtain expression to find the wavelength of light in Newtonβs rings experiment.

Or

Explain in detail the Newtonβs rings experiment.

Or

Write down the experimental detail of Newtonβs ring to find wavelength of light.Β Β Β **(RGPV Jun 2022, RGPV Jun 2020, RGPV Nov 2018, RGPV May 2018, RGPV Jun 2017)**

**Q. 10)**Β Explain in detail, the working of Michelsonβs interferometer.

Or

Explain the construction and working of Michelsonβs interferometer with the help of a neat diagram. **(RGPV Dec 2020, RGPV May 2019, RGPV Jun 2010)**

**Q. 11)**Β Write a note on different types of polarizations in dielectric materials. **(RGPV Jun 2022)**

**Q. 12)**Β Differentiate between division of amplitude and division of wavefront.

Or

Explain in brief the interference of light. Give its types. **(RGPV Jun 2017)**

Β

**Q. 13)**Β Explain the interference of light by Fresnelβs biprism.

Or

Explain formation of interference fringes by means of a Fresnelβs biprism when monochromatic source of light is used.

Or

Write short note on interference of light by Fresnelβs biprism. **(RGPV May 2018, RGPV Dec 2010, RGPV Jun 2010)**

**Q. 14)**Β Write short note on diffraction grating.

Or

Give the theory of plane transmission grating with the help of a neat diagram.

Or

Give construction and theory of plane transmission grating. Obtain an expression for resolving power of plane transmission grating.

Or

Write short note on plane transmission grating. **(RGPV Nov 2018, RGPV Dec 2012, RGPV Dec 2011, RGPV Jun 2011)**

**Q. 15)****Β **Show that the resolving power of the grating is directly proportionally to the total width of the ruled space on it.

Or

What do you understand by the resolving power of grating ? Derive the necessary expression.

Or

Deduce the expression for the resolving power of the grating. **(RGPV Dec 2015, RGPV Jun 2017, RGPV March/April 2010)**

**UNIT-3 Introduction to Solid**

**Q. 1)**Β Write short note any two of the following : a) Fermi levelΒ Β b) Hall effectΒ c) Zener diodeΒ Β d) Solar cell **(RGPV Dec 2020)**

**Q. 2)****Β **Explain the variation of Fermi level in N-type semiconductor with concentration and temperature. **(RGPV Jun 2022)**

**Q. 3)**Β What is P-N junction diode ? Discuss its I-V characteristics. **(RGPV Dec.2022)**

**Q. 4)**Β Explain construction and working of solar cell with neat diagrams. **(RGPV Dec.2022)**

**Q. 5)**Β What is Zener diode ? Discuss its I-V characteristics. **(RGPV Jun 2022)**

**Q. 6)**Β Deduce an expression for Hall coefficient and Hall voltage. **(RGPV Jun 2022, RGPV Dec.2022)**

Β

**Q. 7)**Β Write short notes on Blochβs theorem. **(RGPV Dec.2022)**

**Q. 8)**Β Write short notes on solar cell. **(RGPV Jun 2022)**

**Q. 9)**Β Explain band theory for solids and distinguish metals, semiconductors and insulators on the basis of band theory.

Or

Short note on energy band in solid.

Or

Discuss the ban theory of solids.Β **(RGPV Jun 2017, RGPV Dec 2015, RGPV Jun 2009, RGPV Sept 2009)**

**Q. 10)**Β Define fermi level of a semiconductor.

Or

Write short note on Fermi level.Β **(RGPV Nov 2018, RGPV Jun 2017)**

**Q. 11)**Β Discuss Blochβs theorem for particles in a periodic potential.

Or

Write short note on Blochβs theorem. **(RGPV Nov 2018, RGPV May 2019)**

**Q. 12)**Β Discuss salient features of Kronig-Penny model.

Or

Discuss Kronig-Penny model.

Or

Write short note on Kronig-Penney model. **(RGPV Dec 2017, RGPV May 2018, RGPV Nov 2018, RGPV Dec 2012, RGPV Jun 2011)**

**Q. 13)** What is Zener breakdown ? Explain briefly.

Or

What is Zener diode ? Explain its working with the help of characteristic curve.

Or

Write a note on Zener diode.

Or

Explain the V-I characteristics of Zener diode. **(RGPV Dec 2015, RGPV Dec 2017, RGPV Dec 2014, RGPV Jun 2009)**

**Q. 14)**Β Explain constructional working, with the help of I-V characteristic for the solar cell semiconductor device.

Or

Write short note on solar cells.

Or

Discuss the basic operation and characteristics of a solar cell with necessary diagram. **(RGPV Nov 2018, RGPV Dec 2013, RGPV Jun 2009, 2010)**

**Q. 15)**Β Explain Hall effect. Obtain the expression for Hall coefficient.

Or

Write short on Hall effect.

Or

Explain Hall effect. **(RGPV Dec 2015,2016,2017, RGPV May 2018, RGPV May 2019)**

**UNIT-4 Lasers**

**Q. 1)**Β Derive the relationship between Einsteinβs A and B coefficients.

Or

Establish the relationship between Einsteinβs coefficient A and B.

Or

Obtain relation between the transition probabilities of Einsteinβs A and B coefficients. **(RGPV Dec.2022, RGPV Dec.2013, RGPV Jun 2010)**

**Q. 2)**Β Explain working of He-Ne laser.

Or

Describe the working principle and construction of any one laser.

Or

Explain the construction and working of a He-Ne laser with energy level diagram.

Or

Explain with the help of a neat diagram the principle and working of a He-Ne laser. **(RGPV Jun 2020, RGPV Dec 2020, Dec 2022, RGPV May 2019, RGPV Nov 2018, RGPV May 2018)**

**Q. 3)**Β Explain working of a Ruby laser.

Or

Describe the working of Ruby LASER with energy level diagram.

Or

Explain construction and working of a Ruby LASER.

Or

Explain the construction and working of any one laser with the necessary diagram. **(RGPV Jun 2022, RGPV Dec 2017, RGPV Dec 2016 , RGPV Dec 2014, RGPV Jun 2017, RGPV Jun 2010, RGPV Jun 2012)**

**Q. 4)**Β Explain the propagation of light in an optical fibre. What is maximum angle of acceptance and acceptance cone ?

Or

Write short note on principle of optical fibre and acceptance angle. **(RGPV Jun 2013, RGPV Nov 2018)**

**Q. 5)**Β Derive the expression for numerical aperture of a step index optical fibre.

Or

Define numerical aperture in optical fibre.

Or

Derive expression for numerical aperture of an optical fibre. **(RGPV May 2019, RGPV Nov 2018, RGPV Dec 2017, RGPV Jun 2017)**

**Q. 6)**Β Write a note on V-number. **(RGPV Jun 2020, RGPV Jun 2022)**

**Q. 7)****Β **Write down the role of each block used in optical fibre communication system.

Or

Describe schematically the basic element of optical fibre communication system. **(RGPV Dec 2015, RGPV Jun 2017)**

**Q. 8)**Β Find Curl of following. f = 3xi β 2yzk + 4x2yzj **(RGPV Jun 2020)**

**Q. 9)**Β Explain the numerical aperture of an optical fiber. Calculate the numerical aperture of a fiber with refractive indices of core and cladding are 1.55 and 1.50, respectively. **(RGPV Dec.2022)**

**Q. 10)**Β Discuss the properties of Laser light.

Or

Write short note on properties of laser light.

Or

Explain major properties of a laser light.

Or

Explain basic properties of laser light. **(RGPV Dec 2022,RGPV Jun 2022, RGPV May 2019, RGPV Nov 2018, RGPV Jun 2017, RGPV Jun 2016)**

**Q. 11)**Β Deduce the expression for acceptance angle of and optical fiber. Find the acceptance angle of a fiber having core and cladding refractive indices are 1.55 and 1.50, respectively. **(RGPV Jun 2022)**

**Q. 12)**Β Explain Maxellβs equations in vacuum. **(RGPV Dec 2020, RGPV Dec 2022)**

**Q. 13)**Β Derive expression for numerical aperture of a step index fiber. **(RGPV Dec 2020)**

**Q. 14)**Β Write some major applications of laser. **(RGPV Dec 2020)**

**Q. 15)****Β **Differentiate between spontaneous and stimulated emission.

Or

Define spontaneous and stimulated emission of light **(RGPV May 2018, RGPV Dec 2012)**

**UNIT-5 Electrostatics in Vacuum**

**Q. 1)**Β Find gradient of following: 4×2Β β 3xy β 8z2yΒ **(RGPV Jun 2020)**

**Q. 2)**Β Derive Gauss Divergence theorem.

Or

State and prove the divergence theorem. Discuss its uses.

Or

State and prove the Gaussβs divergence theorem. **(RGPV Dec 2020, RGPV Jun 2007, RGPV Jun 2017)**

**Q. 3)**Β Explain Gauss law in point form.

Or

State and explain the Gaussβs law.

Or

Write short note on Gauss theorem. **(RGPV May 2019, RGPV Jun 2008, RGPV Jun 2005)**

**Q. 4)**Β Find the value of Curl. F = 2xΓ + ( 5y β 9z ) j β 9yk **(RGPV Dec 2020)**

**Q. 5)**Β Derive equation of continuity. **(RGPV Jun 2020)**

**Q. 6)**Β State and explain Stokeβs and Gauss theorem. **(RGPV Dec 2022, Dec 2020, Jun2020)**

**Q. 7)**Β Explain Maxwellβs equations in vacuum. **(RGPV Dec 2020, RGPV Jun 2020, RGPV Nov 2018)**

**Q. 8)****Β **Explain /Discuss Maxellβs equation in integral and differential forms. **(RGPV Dec 2016, RGPV Jun 2016)**

**Q. 9)**Β Discuss about the continuity equation. **(RGPV Jun 2022, RGPV Nov 2018)**

**Q. 10)**Β Explain Poynting theorem. **(RGPV Dec 2020, RGPV Dec 2009)**

**Q. 11)**Β Write short note on Coulombβs law. **(RGPV Dec 2016)**

**Q. 12)**Β Explain displacement current. **(RGPV Dec 2009)**

**Q. 13)**Β State and prove Stokeβs theorem. **(RGPV Dec 2002, 2003, 2004, 2015)**

**Q. 14)****Β **Find gradient of following :Β 4×2Β β 3xy -8z2y **(RGPV Nov 2018)**

**— Best of Luck for Exam —**

__Also Read__