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BASHA ACADEMY (WEBSITE:www.bashaacademy.com) NEW NO: 14, OLD NO: 45, PROF. SANJEEVI STREET, MYLAPORE,CHENNAI-4. PHONE NUMBER: 7708457611,9840571484 NOTE:The following questions have higher probability of repeatedly appearing in the examinations.So it is advisable to give more attention to these FAQ questions and frequent revisions.However a good student aspiring for centum in Physics is expected to study all the questions .Completely ignoring the other questions is riskier.Practice these questions with periodic revision. LIST OF FAQ QUESTIONS IN PHYSICS UNIT 1,2,3 THREE MARK QUESTIONS Unit 1 1. State the law of conservation of electric charge? 2. Give an example for the law of conservation of electric charge. 3. State Coulomb's law. 4. Define-one coulomb. (or) State and define S.I. Unit of electric charge. 5. Define Electric Field intensity or Electric Field strength at a point. Give its expressions and unit. 6. What is an electric dipole? 7. What is meant by dipole moment? Give its expression. 8. How does a microwave oven work? 9. Define - Electric potential difference between two points. 10. State and define the unit of potential difference. 11. Define - Electric potential at a point. 12. What is meant by equipotential surface? 13. Define electric flux? 14. State Gauss's law. 15. Define-Capacitance. Give its expression. 16. What is a non - polar molecule? Give examples. 17. What is a polar molecule? Give examples. 18. What are applications of capacitors? 19. What is meant by action of points or corona discharge?name the devices which use this principle. Unit 2 1. What is meant by electromotive force (EMF)? Is it a force? 2. Define - electric current. Give its expression and unit. 3. Define drift velocity. 4. Define mobility. Give its expression and unit. 5. Define Current - density. Give its expression. 6. State Ohm's law. 7. What is conductance? Give its unit. 8. Define electrical resistivity (or) Specific resistance. Give its unit. 9. What is electrical conductivity? Give its unit. 10. What is meant by Superconductivity and Superconductors? 11. Define - temperature co-efficient of resistance. Give its unit. 12. 13. 14. 15. 16. 17. 18. What is a thermistor? State Kichoff's I law. State Kirchoff's II law. Compare EMF and potential difference State Faraday's I law of electrolysis. State Faraday's II law of electrolysis. What are the applications of secondary cells? Unit 3 THERMAL EFFECT OF ELECTRIC CURRENT 1. State Joule's law. 2. Which substance is used as heating element in electric heating devices? Give reasons. 3. Thermal effect is undesirable. Give examples. 4. What is Seebeck effect? What is meant by thermocouple. 5. 6. 7. 8. 9. 10. What is Neutral temperature? What is temperature of inversion? What is a Peltier effect? Define Peltier co-efficient. Give its unit. What is Thomson effect? Define Thomson Co-efficient. Give its Unit. MAGNETIC EFFECT OF ELECTRIC CURRENT 1. 2. 3. 4. 5. 6. Give Maxwell's Right hand cork screw rule. State Biot-Savart law. State Amperes circuital law. What is Right hand palm rule? What is End rule? What is magnetic lorentz force.? Give its expressions. 7. What are the limitations of Cyclotron? 8. Define Current sensitivity of galvanometer. 9. Define Voltage sensitivity of galvanometer. FIVE MARK QUESTIONS UNIT 1 1. What is an electric line of force? Explain its properties. 2. Derive an expression for the torque experience by an electric dipole placed in a uniform electric field. 3. Derive an expression for electric potential at a point due to a point charge. 4. Explain the principle of a capacitor. 5. Derive the expression for effective capacitance when capacitors are connected in series. 6. Derive the expression for effective capacitance when capacitors are connected in parallel 7. Derive an expression for the energy stored in a capacitor. a a 8. Derive an expression for the electric field due to an infinite plane sheet of charge. 9. Derive an expression for the electric field due to two parallel sheets of charge. UNIT 2 1. Derive an expression for the drift velocity. 2. Derive the relation between the current and drift velocity. 3. Derive Ohm's law. Explain the various aspects of Ohm's law. 4. Write a note on superconductivity. 5. Derive an expression for the equivalent resistance or effective resistance of resistances (i) in series (ii) in parallel. 6. State and explain Kirchoff's I law. 7. State and explain Kirchoff's II law. 8. Derive the condition for bridge balance in wheatstone's bridge. 9. Explain the principle of potentiometer. 10. Explain how the emf's of two given cells are compared using potentiometer. 11. Explain how Faraday's laws of electrolysis are experimentally verified. 12. Explain the construction and working of voltaic cell. 13. Explain the construction and working of Daniel cell. 14. Explain the construction and working of Lechlanche cell. 15. Explain construction and working of Lead Acid accumulator. UNIT 3 THERMAL EFFECT OF ELECTRIC CURRENT 1. Explain how Joule's law is experimentally verified. 2. Explain about Neutral temperature and inversion temperature. MAGNETIC EFFECT OF ELECTRIC CURRENT 1. Explain about magnetic lorentz force. 2. Explain the motion of a charged particle in a uniform magnetic field. Deduce the expressions for angular frequency and period. 3. Derive an expression for the force between two long parallel current carrying conductor. Hence define ampere. 4. Explain how a galvanometer can be converted into an ammeter. 5. Explain how a galvanometer can be converted into a voltmeter. TEN MARK QUESTIONS UNIT 1 1. Derive an expression for the electric field at a point on the axial line of an electric dipole. 2. Derive an expression for the electric field at a point on the equatorial line of an electric dipole. 3. Derive an expression for electric potential at a point due to an electric dipole. 4. Derive an expression for the capacitance of a parallel plate capacitor. 5. Explain the construction and working of Van de Graff Generator. UNIT 3 1. Derive an expression for the magnetic induction due to an infinitely long straight conductor carrying current. 2. Derive an expression for the magnetic induction along the axis of a circular coil carrying current. 3. Explain the construction and working of tangent galvanometer. 4. Explain the construction and working of Cyclotron. Give their limitations. 5. Derive an expression for the force acting on a current carrying conductor placed in a magnetic field. 6. Explain the construction and working of moving coil galvanometer. 7. Derive an expression for the magnetic dipole moment of a revolving electron.