12th CHSE Syllabus

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Physics

Electric charges and fields

  • Electric charge and its quantization
  • conservation of charge
  • Coulomb’s law
  • force between two-point charges
  • superposition principle

Electrostatic potential and capacitance

  • Electric potential
  • potential difference
  • potential due to a dipole
  • potential due to a system of charges
  • Equipotential surfaces
  • electrical potential energy
  • Conductors, insulators
  • free charges and bound charges inside a conductor, capacitors and capacitance
  • combination of capacitors in series and in parallel energy sorted in a capacitor

Current Electricity

  • Electric current
  • drift velocity
  • Ohm’s law
  • electrical resistance
  • conductance
  • resistivity
  • conductivity
  • effect of temperature on resistance
  • electrical energy and power
  • carbon resistors
  • colour code of carbon resistor
  • EMF and potential difference
  • internal resistance of a cell
  • combination of cells in series and parallel
  • Kirchhoff’s law
  • Potentiometer-Principle and its application
  • EMF of two cell

Magnetic effect of Current and magnetism

  • Moving charges and magnetism
  • Concept of magnetic field
  • Oersted's experiment
  • Biot-Savart law
  • Ampere’s law and its application
  • Straight and toroidal solenoid
  • Cyclotron
  • Force on a current-carrying conductor in a uniform magnetic field
  • force between two parallel current-carrying conductors
  • torque experienced by a current loop
  • moving coil galvanometer
  • conversion of current from ammeter and voltmeter

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
  • torque on a magnetic dipole
  • bar magnet as an equivalent solenoid
  • magnetic field lines

Electromagnetic induction and Alternating current

  • Electromagnetic induction
  • Faraday’ laws of electromagnetic induction
  • induced EMF and current
  • Lenz’s Law
  • Eddy currents
  • self and mutual induction
  • Alternating Current
  • Alternating currents
  • peak and RMS value of alternating current
  • LC oscillation
  • LCR series circuit
  • resonance
  • power in AC circuits
  • wattless current
  • A.C. generator and transformer

Electromagnetic waves

  • Basic idea of displacement current
  • characteristics of electromagnetic waves
  • their transverse nature
  • Electromagnetic spectrum and their uses

Optics

  • Ray optics and optical instruments
  • Reflection of light
  • spherical mirrors
  • mirror formula
  • lateral and longitudinal magnification
  • total internal reflection and its applications
  • optical fibre
  • Refraction at spherical surfaces
  • lens formula
  • lens makers formula
  • magnification
  • power of lenses
  • two thin lenses in contact, etc
  • Scattering of light
  • Blue colour of the sky and reddish appearance of sun at sunset and sunrise
  • Optical instruments: microscopes and telescopes

Waves Optics

  • Wavefront
  • Huygen’s principle
  • reflection and refraction of plane waves
  • proof of laws of reflection and refraction using Huygen’s principle
  • Interference
  • Young’s double-slit experiment
  • resolving power of microscope and astronomical telescope
  • polarization
  • Brewster’s law
  • uses of plane-polarized light and polaroid’s

Dual nature of Radiation and matter

  • Dual nature of radiation
  • Photoelectric effect
  • Hertz and Lenard’s observations
  • Einstein’s photoelectric equation
  • Matter waves
  • de-Broglie relation
  • Davisson- Germer experiment

Atoms and Nuclei

  • Atoms
  • Rutherford’s model of atom
  • Bohr model
  • energy levels
  • hydrogen spectrum
  • Nuclei
  • Atomic nucleus
  • nature of nuclear force
  • binding energy per nucleon
  • nuclear fission
  • fusion
  • Radioactivity
  • alpha
  • beta and gamma particles
  • radioactive decay law
  • half-life and decay constant

Semiconductor electronics

  • Energy bands in conductors
  • semiconductors and insulators
  • p-type, n type semiconductors
  • semiconductor diode
  • V-I characteristics, diode etc
  • Special purpose p-n junction diodes
  • Zener diode as a voltage regulator, etc.
  • Junction transistor
  • transistor action
  • Logic gates (OR, AND, NOT, NAND, and NOR)
  • basic idea of analog and digital signals

Communication System

  • Elements of a communication system
  • bandwidth of signals
  • bandwidth of transmission medium
  • propagation of electromagnetic waves in the atmosphere
  • sky and space wave propagation
  • satellite communication
  • modulation
  • basic idea about internet
  • mobile telephony and GPS

Biology

Reproduction

  • Reproduction in organisms
  • Reproduction
  • Modes of reproduction
  • Sexual reproduction in flowering plants
  • Flower structure
  • Development of male and female gametophytes
  • Pollination-types
  • Double fertilization
  • Development of endosperm and embryo
  • Development of seed and formation of fruit
  • Significance of seed and fruit formation etc
  • Human Reproduction
  • Male and female reproductive systems
  • Gametogenesis
  • Menstrual cycle
  • Fertilization
  • embryo development
  • Pregnancy and placenta formation etc
  • Reproductive health
  • Need for reproductive health and prevention of sexually transmitted diseases
  • Birth control
  • Infertility and assisted reproductive technologies

Genetics and Evolution

  • Heredity and Variation
  • Mendelian Inheritance
  • Pleiotropy
  • Elementary idea of polygenic inheritance
  • Chromosome theory of inheritance
  • linkage and crossing over etc
  • Sex determination
  • In humans
  • birds
  • honey bee
  • Sex-linked inheritance
  • Mendelian disorders in humans
  • Thalassemia
  • Chromosomal disorders in humans
  • Molecular Basis of Inheritance
  • Structure of DNA and RNA
  • DNA packaging; DNA replication
  • Gene expression and regulation- Lac Operon
  • human genome project; DNA fingerprinting.
  • Evolution
  • Origin of life
  • Darwinism
  • Modern Synthetic Theory of Evolution
  • Mechanism of evolution
  • Natural Selection with examples
  • types of natural selection
  • Hardy-Weinberg’s principle
  • Adaptive Radiation; Human evolution etc
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