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CBSE Class 12 Physics Board Exam 2018: Most Important Topics and Derivations

Jan 10, 2018 13:25 IST
    Important Topics and Derivations for CBSE Class 12 Physics Board Exam 2018
    Important Topics and Derivations for CBSE Class 12 Physics Board Exam 2018

    Learn about important topics and derivations which can be asked in CBSE Class 12 Physics Board Exam 2018. CBSE will soon release date sheet for Class 12 board exam 2018. CBSE Class 12 Physics Board Exam 2018 is expected to be held in mid of March.

    The syllabus of CBSE Class 12 Physics is vast. There are total 15 chapters (or 10 Units) in NCERT textbooks of Class 12 Physics (Part I and Part II). Students preparing for CBSE Class 12 Physics board exam 2018 should know about important topics and derivations.

    Although all the topics mentioned in latest CBSE Class 12th Physics syllabus 2018 are important. But, after the analysis of some previous year papers of CBSE Class 12th Physics, we have identified some important derivations, topics and questions which are extremely important for CBSE Class 12th Physics 2018 board exam.

    CBSE Class 12 Physics Sample Paper 2018

    CBSE Class 12th Physics Notes: All Chapters

    Complete details related to important derivations and topics which can be asked in CBSE Class 12 board exam 2018 are given below:

    Unit 1: Electrostatics

    There are two chapters in this unit. Chapter: 1 is Electric Charges and Fields and Chapter: 2 is Electrostatic Potential and Capacitance. Important topics and derivations of these chapters are given below:

    Chapter 1: Electric Charges and Fields

    Coulomb’s law in vector form (Agreement with Newton’s third law i.e. F12 = ‒F21).

    Electric field intensity on Equatorial Line & Axial Line of an Electric Dipole.

    Electric Field Intensity at various points due to a uniformly charged spherical shell (thin & thick both).

    Electric filed intensity due to a thin infinite plane sheet of charge.

    Application of Gauss theorem in calculation of electric field.

    Chapter 2: Electrostatic Potential and Capacitance

    Electric Potential due to a point charge.

    Electric Potential on Axial Line & Equatorial Line of an Electric Dipole.

    Capacitance of parallel plate capacitor (with or without dielectric medium).

    Energy stored in a capacitor.

    NCERT Exemplar for Class 12 Physics – All Chapters

    Unit 2: Current Electricity

    There is only 1 chapter in this unit that is Current Electricity. Important concepts and derivations expected to be asked in CBSE Class 12 Physics board exam 2018 from this chapter are given below:

    Chapter ‒ 3: Current Electricity

    Expression for drift velocity.

    Relation between current and drift velocity.

    Series and parallel connection of resistors (Derivations and Numerical Problems).

    Kirchhoff’s laws and simple applications (Definition and Numerical Problems).

    Potentiometer (Numerical are expected this year)

    Unit 3: Magnetic Effects of Current and Magnetism

    There are two chapters in this unit of Class 12 Physics NCERT textbook. Name of these chapters are Moving Charges and Magnetism & Magnetism and Matter.

    Important topics and derivations of these chapters are given below:

     Chapter – 4: Moving Charges and Magnetism

    Application of Biot - Savart law (Calculation of magnetic field due to current carrying circular loop).

    Ampere’s law and its applications (Magnetic field due to infinitely long straight wire; Straight and toroidal solenoids).

    Force on a moving charge in uniform magnetic and electric fields (Numerical and Derication)

    Cyclotron (Diagram, Theory and Derivation).

    Force on a current-carrying conductor in a uniform magnetic field (Derivation and Numerical Problems).

    Force between two parallel current-carrying conductors (including 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.

    Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis.

    Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.

    Properties of Para-, dia- and ferro - magnetic substances

    CBSE Class 12 Toppers' Answer Sheet 2017

    Unit 4 Electromagnetic Induction and Alternating Current

    There are two chapters in this unit of Class 12 Physics Syllabus. Name of these chapters are Electromagnetic Induction and Alternating Current.

    Important topics and derivations of these chapters are given below:

    Chapter – 6: Electromagnetic Induction

    Motional EMF or Induced EMF (Derivations and Numerical Problems).

    Mutual Induction and Self Induction.

    Chapter – 7: Alternating Current

    Relation between rms and peak value of current & emf (Numerical Problems and Derivations).

    Reactance, impedance & average power in series LCR, LR, CR or LR circuit. (Numerical Problems and Derivations).

    Resonance in series LCR circuit. (Numerical Problems and Derivations).

    5 Important Resources besides NCERT textbooks for CBSE Board Exam Preparation

    Unit 5: Electromagnetic waves

    There is only one chapter in this unit and that is Electromagnetic waves. Important topics and derivations of this chapter are given below:

    Displacement current (Basic Concept)

    Characteristic and Properties of EM Waves

    Electromagnetic spectrum

    Unit 6 Optics

    There are 2 chapters in this unit. Name of these chapter are Ray Optics and Optical Instruments & Wave Optics.

    Important topics of this chapter are given below:

    Chapter-9: Ray Optics and Optical Instruments

    Total Internal Reflection (Definition and Numerical Problems)

    Lensmaker’s formula (Derivations and Numerical Problems)

    Refraction and dispersion of light through a prism (Derivations and Numerical Problems)

    Scattering of light (Blue colour of sky, reddish appearance of the sun at sunrise and sunset)

    Microscopes and astronomical telescopes (Ray Diagram & Numerical Problems)

    Refractive Index of a Prism and Condition for Minimum Deviation (Derivations and Numerical Problems)

    Chapter-10: Wave Optics

    Young double slit experiment (Derivations and Numerical Problems)

    Diffraction using single slit (Derivations and Numerical Problems)

    Polarisation (Definition and Numerical Problems)

    Unit 7: Dual Nature of Radiation and Matter

    There is only one chapter in this unit. Name of the chapter is Dual Nature of Matter and Radiation. Important topics of this chapter are given below:

    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

    Unit 8: Atoms and Nuclei

    There are two chapters in this unit. Name of these chapters are: Atoms and Nuclei. Important topics and derivations of this chapter are given below:

    Chapter-12: Atoms

    Alpha-particle scattering experiment

    Expression of radius (hydrogen like atoms)

    Bohr model, energy levels, hydrogen spectrum (Including numerical problems)

    Chapter-13: Nuclei

    N = Neλt

    Mass defect (Definition and Numerical Problems)

    Binding energy per nucleon and its variation with mass number (Definition and Numerical Problems)

    Nuclear fission & Nuclear fusion (Definition and Numerical Problems)

    Unit 9 Electronic Devices

    Only one chapter is there in this unit. The name of this chapter is Semiconductor Electronics: Materials, Devices and Simple Circuits. Important topics of this chapter are given below:

    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

    Junction transistor: Common base transistor amplifier and Common emitter transistor amplifier

    Unit 10 Communication System

    Only one chapter is there in this unit. The name of this chapter is Communication System. Important topics and derivations of this chapter are given below:

    Chapter-15: Communication System

    Elements of a communication system

    Propagation of electromagnetic waves in the atmosphere, sky & space wave propagation, satellite communication.

    Types of Modulation and Modulation Index

    These are some important derivations and topic from all the 10 units (or 15 Chapters) of CBSE Class 12th Physics which are likely to be asked in coming 2018 board exam. While preparing for CBSE Class 12th Physics board exam 2018, students should give priority to the topics mentioned above.

    NCERT Solutions for CBSE Class 12 Physics

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