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                      Welcome To Class : XII Subject : Physics IMPORTANT QUESTIONS By Unit Wise Unit - 1                        Unit - 6 Click Here                            Click Here Unit - 2                        Unit - 7 Click Here                             Click Here Unit - 3                        Unit - 8 Click Here                             Click Here Unit - 4                        Unit - 9 Click Here                      ...

                         Welcome To Class : XII Subject : Physics 5 Marks Hints : Minimum points Principle Diagram, Explanation About The Diagram, Final Equation   1 . Van de graaf generator 2. Electric filed at a point on the equatorial line and axial line of a dipole 3. Electric field due to infinite charged plane sheet. 4. Potential at a point due to a dipole. 5. Microscopic model of current – Ohm’s law. 6. Determination of unknown resistance using Meter bridge. 7. Determination of internal resistance using voltmeter. 8. Maxwell’s equations in integral form. 9. Modification of Ampere circuital law displacement current. 10. Davisson and Germer Experiment. 11. Electron microscope. 12. Radio active decay law. 13. Full wave reactifier. 14. Motion of a charged particle in a uniform electric field. 15. Transformer. 16. Refractive index of the prism. 17. Velocity of light by Fizeau ‘s Method. 18. Specific charge ( e/m) ...

                         Welcome To Class : XII Subject : Physics 3 Marks 1 . Torque on a dipole in uniform electric field. 2. Capacitance of parallel plate capacitor. 3. Capacitors in series and Capacitors in parallel 4. Electric field at a point on the axial line 5. Explain microscopic form of current and hence Ohm’s law 6. Discuss resistors in series and Resistors in parallel with necessary circuits. 7. Explain cells in series and cells in parallel. 8. State and Explain Kirchoff’s laws 9. Obtain wheatstone’s principle 10. Explain Seebeck effect and its applications. Explain Thomson effect 11. conversion of Galvanometer to ammeter and voltmeter 12. Types of spectra Emission spectra / Absorption spectra 13. Properties of EM waves 14. Difference between interference and diffraction. 15. Uses of Polaroid 16. Brewster’s law 17. Laws of photoelectric emission 18. Einstein’s photo electric equation 19. Photo cells and its a...

                         Welcome To Class : XII Subject : Physics 2 Marks 1. State Coulomb’s law 2. What is action of points or Corona discharge ? 3. Define : capacitance and its unit. 4. List the uses of capacitors 5. Define : Dipole and dipole moment. 6. State Gauss’s law. 7. Define : Electric flux and write its units. 8. Define : Energy density. 9. Define : Electrostatic potential and Electrostatic potential energy. 10. Define : Resistivity. 11. Define : Temperature co-efficient of resistance. 12. State Ohm’s law and define resistance. 13. Define : Drift velocity. 14. Define current and write the conventional direction of current  15. State Kirchoff’s laws. 16.   What is Seebeck effect or thermoelectric effect ? / thermoemf / thermoelectric current/ thermocouple. 17. What is Peltier effect ? 18. Explain Thompson effect and its types. 19. Write four properties of magnet (*Magnetic length) 20. List the propert...

                        Welcome To Class : XII S ubject : Physics Unit : 10 Unit Name : Semiconductor Electronics IMPORTANT QUESTIONS 2 Marks 1. What do you mean by doping? 2. Distinguish between intrinsic and extrinsic semiconductors. 3. What is rectification? 4. What is an integrated circuit? 5. What is modulation? 6. Define centre frequency or resting frequency in frequency modulation. 3 Marks 1. Transistor functions as a switch. Explain. 2. State and prove De Morgan’s First and Second theorems. 3. What are the advantages and limitations of FM? 5 Marks 1 . Draw the circuit diagram of a half wave rectifier and explain its working. 2. Explain the construction and working of a full wave rectifier. Thank You For  Refering On Our Page.

                         Welcome To Class : XII Subject : Physics Unit : 9 Unit Name : Atomic And Nuclear Physics IMPORTANT QUESTIONS 2 Marks 1.  What is meant by excitation energy. 2. Define the ionization energy and ionization potential. 3. Define impact parameter. 4. What is mass defect? 5. What is binding energy of a nucleus? Give its expression. 6. Calculate the energy equivalent of 1 atomic mass unit. 7. What is mean life of nucleus? Give the expression. 8. What is meant by activity or decay rate? Give its unit. 9. Define curie. 3 Marks 1. Write the properties of cathode rays. 2. Write down the postulates of Bohr atom model. 3. Derive the energy expression for hydrogen atom using Bohr atom model. 4. What are the properties of nuclear force. 5. Discuss the alpha decay process with example. 6. Discuss the gamma decay process with example. 7. Discuss the properties of neutrino and its role in beta decay. 5 Ma...

                         Welcome To Class : XII Subject : Physics Unit : 8 Unit Name : Dual Nature Of Radiation And Matter IMPORTANT QUESTIONS 2 Marks 1. Define work function of a metal. Give its unit. 2. What is photoelectric effect? 3. How will you define threshold frequency? 4. Define stopping potential. 3 Marks 1. List out the laws of photoelectric effect. 2. Give the construction and working of photo emissive cell. 3. Derive an expression for de Broglie wavelength of electrons. 4. Write the applications fo photo cells. 5 Marks 1 . Obtain Einstein’s photoelectric equation with necessary explanation. 2. Describe briefly Davisson – Germer experiment which demonstrated the wave nature of electrons. Thank You For  Refering On Our Page.

                         Welcome To Class : XII Subject : Physics Unit : 7 Unit Name : Wave Optics IMPORTANT QUESTIONS 2 Marks 1.  What is Huygens’ principle? 2. What is bandwidth of interference pattern? 3. What are plane polarised, unpolarised and partially polarised light? 4. State Brewster’s law. 3 Marks 1. Mention the differences between interference and diffraction. 2. State and obtain Malus’ law. 3. List the uses of polaroids. 4. What is angle of polarisation and obtain the equation for angle of polarisation (OR)   State and obtain Brewster’s law. 5 Marks 1 . Obtain the equation for bandwidth in Young’s double slit experiment. 2. Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing. Thank You For  Refering On Our Page.

                         Welcome To Class : XII Subject : Physics Unit : 6 Unit Name : Ray Optics IMPORTANT QUESTIONS 2 Marks 1. State the laws of refraction (OR) Snells law. 2. What is critical angle and total internal reflection? 3. What is Rayleigh’s scattering? 4. Why does sky appear blue? 5. What is the reason for reddish appearance of sky during sunset and sunrise? 6. Why does clouds appear white? 3 Marks 1. Derive the relation between f and R for a spherical mirror. 2. What is optical path? Obtain the equation for optical path of a medium of thickness   d and refractive index n. 3. Obtain the equation for apparent depth. 4. Obtain the equation for critical angle. 5 Marks 1 . Derive the mirror equation and the equation for lateral magnification. 2. Describe the Fizeau’s method to determine speed of light. 3. Obtain lens maker’s formula and mention its significance. 4. Derive the equation for angle of d...

                         Welcome To Class : XII Subject : Physics Unit : 5 Unit Name : Electromagnetic Waves IMPORTANT QUESTIONS 2 Marks 1. Write down the integral form of modified Ampere’s circuital law. 2. What is meant by Fraunhofer lines? 3. Why are em waves non mechanical? 3 Marks 1. What are emission spectra? Give their types. 2. What are absorption spectra? Give their types. 3. Write down the properties of electromagnetic waves. Thank You For  Refering On Our Page.

                         Welcome To Class : XII Subject : Physics Unit : 4 Unit Name : Electromagnetic Induction And Alternating Current IMPORTANT QUESTIONS 2 Marks 1. State Fleming’s right hand rule. 2. Mention the ways of producing induced emf. 3. Define electric resonance. 4. How will you define Q-factor? 3 Marks 1.  How will you induce an emf by changing the area enclosed by the coil? 2. Mention the various energy losses in a transformer. 3. Find out the phase relationship between voltage and current in a pure resistive circuit.   4. Assuming that the length of the solenoid is large when compared to its diameter, find the equation for its inductance. 5 Marks 1 . Show mathematically that the rotation of a coil in a magnetic field over one rotation induces an alternating emf of one cycle. 2. Explain the construction and working of transformer. 3. Find out the phase relationship between voltage and current i...

                         Welcome To Class : XII Subject : Physics Unit : 3 Unit Name : Magnetism And Magnetic Effects Of Electric Current IMPORTANT QUESTIONS 2 Marks 1.  Define magnetic flux. Mention its unit. 2. State Coulomb’s inverse law in magnetism.   3. State Ampere’s circuital law. 4. State flemmings left hand rule. 5. How is a galvanometer converted into i)Ammeter ii) Voltmeter 3 Marks 1. Find the magnetic induction due to a long straight conductor using Ampere’s circuital law. 2. Give an account of magnetic lorrentz force. 3. Explain how galvanometer is converted into an ammeter. 4. Explain how galvanometer is converted into an voltmeter. 5 Marks 1 . Deduce the relation for the magnetic induction at a point due to an infinitely long straight conductor carrying current. 2. Obtain an expression for the force between two long parallel current carrying conductor. 3. Obtain an expression for the force o...

                         Welcome To Class : XII Subject : Physics Unit : 2 Unit Name : Current Electricity IMPORTANT QUESTIONS 2 Marks 1.  Distinguish between drift velocity and mobility. 2. Define electrical resistivity. Mention its unit.   3. Define temperature coefficient of resistance. Mention its unit. 4. Distinguish electric power and electric energy? 5. What is Thomson effect? 6. What is Peltier effect? 3 Marks 1.  Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its  limitation. 2. State and explain Kirchhoff’s rules. 3. Explain the equivalent resistance of a series and parallel resistor network. 4. Explain the determination of the internal resistance of a cell using voltmeter. 5 Marks 1 . Describe the microscopic model of current and obtain general form of Ohm’s law. 2. Obtain the condition for bridge balance in Wheatstone’s bridge. Thank You For  R...

                       Welcome To Class : XII Subject : Physics Unit : 1 Unit Name : Electrostatics IMPORTANT QUESTIONS 2 Marks 1. Define ‘Electric dipole’and dipole moment? 2. Define ‘electrostatic potential”. 3. Define ‘electric flux’. Mention its unit. 4. Define ‘capacitance’. Give its unit. 5. What is corona discharge? 6. State Coulomb’s law. 3 Marks 1. Derive an expression for the torque experienced by a dipole due to a uniform electric  field. 2. Derive an expression for electrostatic potential due to a point charge. 3. Obtain the expression for capacitance for a parallel plate capacitor. 4. Obtain the expression for energy stored in the parallel plate capacitor. 5 Marks 1.  Calculate the electric field due to a dipole on its axial line. 2. Derive an expression for electrostatic potential due to an electric dipole. 3. Obtain the expression for electric field due to an infinitely long charged wire. 4. Derive ...