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# XIIth Physics Crash Course 2020-21 How Can TutorArc Help in Class 12 Physics Preparation?

The lessons covered in the above linked articles are easy to understand and any student can easily understand the fundamentals thoroughly. The lessons even include various examples and parctice questions to help the students develop problem-solving abilities which will not only help them during their class 12 board exams but will also help them for JEE and other similar competitive exams.

Unit I: ELECTROSTATICS [12 Periods]
Chapter 1: Electric Charges and Fields
Electric Charges; Conservation of charge, Coulomb's law-force between two-point charges,  forces  between  multiple  charges;  superposition  principle  and  continuous charge distribution. Electric  field,  electric  field  due to  a point  charge, electric  field  lines,  electric  dipole, electric field due to a dipole, torque on a dipole in uniform electric field.
Electric flux, statement of Gauss's  theorem and its applications to  find field due to infinitely long straight wire, uniformly charged infinite plane sheet

Chapter 2: Electrostatic Potential and Capacitance
Electric potential, potential difference, electric potential due to a point charge, a dipole and system of charges; equipotential surfaces, electrical potential energy of a system of two point charges and of electric dipole in an electrostatic field.
Conductors and insulators,  free  charges  and  bound   charges  inside  a conductor. Dielectrics and electric polarisation, capacitors and capacitance, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, energy stored in a capacitor.

Unit II: CURRENT ELECTRICITY [10 Periods]
Chapter 3: Current Electricity
Electric current, flow of electric charges in  a metallic conductor, drift velocity,  mobility and   their   relation   with   electric   current;   Ohm's   law,   electrical   resistance,   V-I characteristics (linear and nonlinear), electrical energy and power, electrical resistivity and conductivity; temperature dependence of resistance.
Internal resistance of a cell, potential difference and emf of a cell, combination of cells in series and in parallel, Kirchhoff's laws and simple applications, Wheatstone bridge, metre bridge(qualitative ideas only)
Potentiometer  - principle  and its  applications  to measure potential  difference  and for comparing EMF of two cells; measurement of internal resistance of a cell(qualitative ideas only)

Unit III: MAGNETIC EFFECT OF CURRENT & MAGNETISM [8 Periods]
Chapter 4: Moving Charges and Magnetism
Concept of magnetic field, Oersted's experiment.
Biot - Savart law and its application to current carrying circular loop.
Ampere's law and its applications to infinitely long straight wire. Straight and toroidal solenoids (only qualitative treatment), force on a moving charge in uniform magnetic and electric fields
Force on a current-carrying conductor in a uniform magnetic field, force between two parallel  current-carrying  conductors-definition  of  ampere,  torque experienced  by  a current loop  in uniform  magnetic field;  moving  coil galvanometer-its  current sensitivity and conversion to ammeter and voltmeter.

Chapter 5: Magnetism and Matter
Current loop as a magnetic dipole and its magnetic dipole moment, magnetic dipole moment of a revolving electron, bar magnet as an equivalent solenoid, magnetic field lines; earth's magnetic field and magnetic elements.

Unit IV: ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENTS [6 Periods]
Chapter 6: Electromagnetic Induction
Electromagnetic induction; Faraday's laws, induced EMF and current; Lenz's Law, Eddy currents. Self and mutual induction.

Chapter 7: Alternating Current
Alternating currents, peak and RMS value of alternating current/voltage; reactance and impedance; LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits
AC generator and transformer.

Unit V: Electromagnetic waves [5 Periods]
Chapter 8: Electromagnetic Waves
Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only).
Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.

Unit VI: Optics[12 Periods]
Chapter 9: Ray Optics and Optical Instruments
Ray Optics: Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lensmaker's formula, magnification, power of a lens, combination of thin lenses in contact, refraction of light through a prism.
Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.

Chapter 10: Wave Optics
Wave optics: Wavefront and Huygens principle, reflection and refraction of plane waves at a plane surface using wave fronts. Proof  of laws of reflection and refraction using Huygens principle. Interference, Young's double  slit  experiment  and expression for fringe width, coherent sources and sustained interference of light, diffraction due to a single slit, width of central maximum

Unit VII: Dual Nature of Radiation and Matter [5 Periods]
Chapter 11: Dual Nature of Radiation and Matter
Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations; Einstein's photoelectric equation-particle nature of light.
Experimental study of photoelectric effect
Matter waves-wave nature of particles, de-Broglie relation

Unit VIII: Atoms and Nuclei [8 Periods]
Chapter 12: Atoms
Alpha-particle  scattering  experiment;  Rutherford's  model  of atom; Bohr  model,  energy levels, hydrogen spectrum.

Chapter 13: Nuclei Composition and size of nucleus Nuclear force
Mass-energy relation, mass defect, nuclear fission, nuclear fusion.

Unit IX : Electronic Devices [7 Periods]
Chapter 14: Semiconductor Electronics: Materials, Devices and Simple Circuits
Energy bands in conductors, semiconductors and insulators (qualitative ideas only) Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier; Special purpose p-n junction diodes: LED, photodiode, solar cell. YOU ARE VISITOR NO : 989740