physics imp topics.docx

May 20, 2018 | Author: Anonymous 3NrQRNi | Category: Optics, P–N Junction, Electric Current, Capacitor, Magnetic Field


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Chapter 1 – Electronic Charges and FieldImportant Topics: 1. Coulomb’s Law 2. Forces between multiple charges electric field due to system of charges 3. Electric dipole’s electric field on axial and equatorial point 4. Electric dipole in external electric field 5. Gauss’s law applications MERITNATION TIPS: a) The mention topics are based on basic Coulomb’s force and electric field due to charges. b) Numericals from applications of Gauss law, forces between system of charges and Electric field due to system of c frequently. c) Tracing electric field lines for monopole, dipole or system of charges is a very interesting as well as important topic d) Straight forward derivations are asked as Short Answers-II for torque experienced by dipoles, electric field due to d equatorial points. e) It is also advised to make a small summary for results obtained by application of Gauss law for quick review. Chapter 2 – Electrostatic Potential and Capacitance Important Topics: 1. Potential due to electric dipole and system of charges 2. Electric potential energy due to electric dipole and system of charges 3. Equipotential surfaces 4. Effect of dielectric on capacitors 5. Combinations of capacitors 6. Energy stored in capacitors MERITNATION TIPS: a) The unit provides a good weightage to the numericals and direct derivations, so it is advised that no topic should b b) Derivations or topics like energy stored in the capacitors, potential due to electric dipole and potential energy of sy asked. c) Both Short Answers and Long Answer numericals are asked to calculate the potential energy due to system of cha d) Complex combinations of capacitors are given to evaluate the effective capacitance or charge on plates. Do intens e) Tracing equipotential surface for dipole or system of charges is an important an interesting topic. very short questio Chapter 3 – Current Electricity Important Topics: 1. Ohm’s Law 2. Limitations of ohm’s law 3. Resistivity of different materials 4. Combination of resistors 5. Combination of cells 6. Kirchhoff’s law 7. Meter bridge 8. Potentiometer MERITNATION TIPS: a) Definitions and relations of resistance, conductance, resistivity, conductivity, drift velocity, internal resistance, cell E answers and very short answer very frequently. b) Graph for resistivity for metals, alloys and semiconductors should be practised. c) Interpretation of complex circuits involving resistors and cells should be resolved into simple parallel and series com Numericals involving these circuits are frequently asked and use of Wheatstone bridge and Kirchhoff’s law should be Student should practise a wide range of such problems to practise the topic. d) Direct questions are asked every year from the topics Meter bridge or Potentiometer. e) Learn resistivity chart for different color codes, short numerical can be asked. Chapter 4 – Moving Charges and Magnetism Important Topics: 1. Magnetic force on current carrying wire 2. Motion in a magnetic field 3. Velocity selector 4. Cyclotron 5. Magnetic field on axis of circular current carrying loop 6. Ampere’s circuital law 7. Force between two parallel current carrying wires 8. Torque on current carrying loop in magnetic field 9. Moving coil galvanometer MERITNATION TIPS: a) Direct derivations from topics like Magnetic force on axis of circular coil, ampere circuital law, forces between two c torque on current carrying loop in magnetic field are asked. b) Numericals from mentioned topics are most of the time simple based on the above derived relations or on motion i current carrying loop placed in magnetic field, velocity selector are asked. c) Cyclotron, with its working and figure should be studied intensively. The topics are not much complex but revising t Chapter 5 – Magnetism and Matter Important Topics: 1. Axial magnetic field of bar magnet as solenoid 2. Electric dipole in uniform magnetic field 3. Diamagnetic, Paramagnetic, Ferromagnetic Substances 4. Hysteresis Loop MERITNATION TIPS: a) It is an easy topic and might not require intensive study but to solve numericals or short answers based on topic, in to thoroughly understand the topic. b) Interpretation of hysteresis loop is very helpful. Make a small comparison table for Diamagnetic, Paramagnetic, Fe c) Learn the topics like dipole in uniform magnetic field and bar magnet as solenoid, keep the analogy of electrostatic magnetics analogy is very helpful while learning the topics of magnetics Chapter 6 – Electromagnetic Induction Important Topics: 1. Magnetic flux 2. Faraday’s law of induction 3. Lens law 4. Motional EMF 5. Self inductance and mutual inductance MERITNATION TIPS: a) The chapter gives a good overview of electricity and magnetism together. The concept of emf induced in any cond magnetic field should be very well understood. b) A variety of numericals are asked based on the same concept of emf induced. practise good number of problems f c) Short answers from lens law are also important. d) While solving the numericals please keep in mind the direction of magnetic field or the induced emf. Avoid any suc Chapter 7 – Alternating Current Important Topics: 1. RC, LC, LR and LCR Circuits 2. LC oscillations 3. Power factor 4. Resonance and Sharpness 5. Transformers MERITNATION TIPS: a) Make a comparing summary for RC, LC, LR and LCR combinations with their impedances and phase diagrams an best method to avoid confusion while derivation or solving numericals from the topic. b) Condition for resonance and sharpness of resonance is an important relation. Power factor and LC oscillations are questions and numericals. Intensively study LC oscillations, it is an important topic. c) Transformers numericals for short answers are asked sometimes. Chapter 8 – Electromagnetic Waves Important Topics: 1. Displacement Current 2. EM waves 3. Nature of em waves MERITNATION TIPS: a) Short and simple numerical for short answers are asked from the topic. b) Numericals from displacement current are also important. Make a comparison table of all the types of waves in the the spectrum and their important properties and uses. This does not requires intensive study but the table will help in as short questions from the topic. c) Read about the nature of em waves. Chapter 9 – Ray Optics and Optical Instruments Important Topics: 1. Image formation by spherical mirrors 2. Image formation by spherical lenses 3. Total internal reflection 4. Power and combination of lenses 5. Refraction through a Prism 6. Natural phenomenons due to light 7. Eye 8. Telescope 9. Microscope MERITNATION TIPS: a) All the mentioned important topics are easy, but often students are confused in mirror and lenses and do blunders Strictly follow the new Cartesian sign conventions while using mirror or lens formula. it is also suggested to make a co mirrors and lenses to avoid confusion and memorising. b) Total internal reflection is an easy topic and should not be c) Power of lenses and combinations of lenses are important for numericals. Take care of unit of f while evaluating th this is a very common mistake we do. d) Refraction through prism is an important topic, keep the derivation and important relations on tips. e) The topic on Eye does not require too much mug-up but you must study it and understand its basic structure and w f) Telescope and microscope are both important optical instrument based on the above topics we have studies, so jus memorise the relations. Chapter 10 – Wave optics Important Topics: 1. Reflection and refraction of plane waves using Huygen principle 2. Incoherent and coherent waves addition 3. Interference and Young’s double slit experiment 4. Diffraction of light 5. Resolving power of optical Instruments 6. Polarisation by scattering MERITNATION TIPS: a) Deduction of law of reflection and refraction is an important derivation using Huygens principle is often asked. b) Expression for fringe width in YDSE is important derivation. make a short summary for comparison of the widths of YDSE. Expression for angular width of central maximum of diffraction pattern and brewster law are frequently asked. c) Apart from the theory and direct derivations from the above topics, numericals from mentioned important topics are to trace the wavefronts for both reflection and refraction for the optical surface using Huygens theory. d) Polarisation does not need intensive study, only a brief understanding is enough to answer the basic questions ask Chapter 11 – Dual Nature of Radiation and Matter Important Topics: 1. Photoelectric effect 2. Einstein photoelectric equation 3. de Broglie hypothesis 4. Davisson and Germer experiment MERITNATION TIPS: a) List down the important relations based on the physical quantities like energy, momentum and power of photons, a hypothesis. As simple numericals based on the relations are asked often. while solving the numericals keep care of c Joules, Planck’s and de Broglie hypothesis gives quality questions, so study both the theories briefly. b) Einstein’s photoelectric equation, Planck’s constant and work function of metal, de Broglie’s wavelength are import Though short numericals are also included in the exams. c) Often a long question is asked from Davisson Germer experiment. d) Graphical interpretation of relation between i current and other mentioned important topics from experimental effect of photoelectric effect is asked frequently. Chapter 12 – Atoms Important Topics: 1. Electron Orbits 2. Atomic spectra 3. Bohr Model of Hydrogen atom 4. Line spectra of Hydrogen atom 5. de-Broglie explanation of Bohr’s postulate MERITNATION TIPS: a) List up all the relations of Bohr model of hydrogen and atomic spectra. DIstance for closest approach is an importa all the relations of Bohr’s theory of hydrogen atom. Rydberg formula is also an important relation. b) Revise the series once with relations from line spectra. c) Topics covered in this unit are easy but still important relations should be learned to do well in numericals. Chapter 13 – Nuclei Important Topics: 1. Nuclear binding energy 2. Radioactivity 3. Radioactive decays MERITNATION TIPS: a) The chapter is basically divided in two sections the first section is completely theoretical. Deep understanding of th understand the second section of the chapter. The second half of the chapter includes radioactivity, from which nume questions are asked. b) Interpretation of binding energy curve is also very important. c) For radioactivity, derivations for mean life, half life a frequently asked. These relations are also important for solving short numericals from the same topic. Chapter 14 – Semiconductor Electronics: Materials, Devices and Simple Circuits Important Topics: 1. Intrinsic semiconductors 2. Extrinsic semiconductors 3. p-n Junction diode 4. p-n Junction in forward bias and reverse bias 5. Junction diode as rectifier 6. Zener diode as voltage regulator 7. n-p-n and p-n-p transistor 8. Transistor as an amplifier 9. Logic gates MERITNATION TIPS: a) Differentiate between intrinsic and extrinsic semiconductors and n-type and p type semiconductors. compare both the conductivity of different materials. b) Current in semiconductors, electrical resistivity of semiconductors are important relations for derivations. c) Graphical representation of voltage characteristics of zener diode is asked frequently. d) Long questions are asked from transistors as an oscillators, amplifiers, rectifiers. So be thorough with their derivati e) Logic gate is an interesting topic, you can score easily by simple revising them once. Practise certain sets of the ga intensive study. Distribute the time logically while preparing for the chapter. Use figure wherever required while answ Chapter 15 – Communication Systems Important Topics: 1. Elements of communication system 2. Basic terminologies of electronic communication system 3. Propagation of em waves 4. Amplitude modulation MERITNATION TIPS: a) Block diagrams are very important. learn all the terminologies on tips, descriptive questions from wave propagation exams.b) Modulation is an important topic, practise the derivation and all the expressions. c) Expression for height of previously. Modulation factor and relation for amplitude modulated wave is also important. The topics are easy, qualit asked so keep a brief review of overall theory. RECOMMENDED RESOURCES: Revision Notes | Sample Papers | Textbook Solutions | Ask & Answer All the best with your final exams! Please take a moment to spread these tips with your friends. After all, Knowledge is the only thing that grows when shared!
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